FauziAkram and Disservin
4fb04eb3df
Simplify history bonus
...
After we recently added the disallowance for negative bonuses, it is no
longer necessary to keep the max comparison in the previous step.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 72000 W: 18820 L: 18637 D: 34543
Ptnml(0-2): 267, 8489, 18276, 8730, 238
https://tests.stockfishchess.org/tests/view/66ce132cbf8c9d8780fdabe7
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 67452 W: 17136 L: 16961 D: 33355
Ptnml(0-2): 35, 7489, 18519, 7632, 51
https://tests.stockfishchess.org/tests/view/66cf6ad49de3e7f9b33d1010
closes https://github.com/official-stockfish/Stockfish/pull/5554
Bench: 1147012
2024-09-09 17:34:31 +02:00
FauziAkram and Joost VandeVondele
451044202a
Simpler formula for ss->cutoffCnt update
...
closes https://github.com/official-stockfish/Stockfish/pull/5548
No functional change
2024-08-28 09:35:21 +02:00
FauziAkram and Joost VandeVondele
4995792a6c
Simplify cutnode reduction formula
...
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 137994 W: 34705 L: 34603 D: 68686
Ptnml(0-2): 124, 15371, 37903, 15477, 122
https://tests.stockfishchess.org/tests/view/66aeb74b4ff211be9d4eda10
Passed LTC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 131456 W: 34148 L: 34031 D: 63277
Ptnml(0-2): 506, 15571, 33465, 15672, 514
https://tests.stockfishchess.org/tests/view/66ae258b4ff211be9d4ed95d
closes https://github.com/official-stockfish/Stockfish/pull/5531
Bench: 1261995
2024-08-20 20:57:07 +02:00
FauziAkram and Joost VandeVondele
986173264f
Adding LowestElo and HighestElo constants
...
These values represent the lowest Elo rating in the skill level calculation,
and the highest one, but it's not clear from the code where these values come
from other than the comment. This should improve code readability and
maintainability. It makes the purpose of the values clear and allows for easy
modification if the Elo range for skill level calculation changes in the
future. Moved the Skill struct definition from search.cpp to search.h header
file to define the Search::Skill struct, making it accessible from other files.
closes https://github.com/official-stockfish/Stockfish/pull/5508
No functional change
2024-07-23 19:23:57 +02:00
FauziAkram and Joost VandeVondele
a2ba3e3362
Bonus Simplification
...
This tune removes completely a recently added term.
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 61376 W: 16046 L: 15693 D: 29637
Ptnml(0-2): 207, 7132, 15665, 7469, 215
https://tests.stockfishchess.org/tests/view/669512b94ff211be9d4ebffb
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 100662 W: 25474 L: 25020 D: 50168
Ptnml(0-2): 64, 11092, 27581, 11514, 80
https://tests.stockfishchess.org/tests/view/66955f194ff211be9d4ec06a
Passed LTC#2:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 28056 W: 7128 L: 6909 D: 14019
Ptnml(0-2): 18, 3084, 7620, 3273, 33
https://tests.stockfishchess.org/tests/view/669a541a4ff211be9d4ec52b
closes https://github.com/official-stockfish/Stockfish/pull/5502
bench: 1619438
2024-07-23 18:01:14 +02:00
FauziAkram and Joost VandeVondele
7395d56832
bonus calculation for prior countermoves
...
Introduce a new term to the bonus calculation for prior countermoves
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 140896 W: 36545 L: 36079 D: 68272
Ptnml(0-2): 383, 16505, 36217, 16949, 394
https://tests.stockfishchess.org/tests/view/6691c73cc6827afcdcee1816
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 126660 W: 32089 L: 31587 D: 62984
Ptnml(0-2): 63, 13774, 35154, 14276, 63
https://tests.stockfishchess.org/tests/view/6691cdc4c6827afcdcee1930
closes https://github.com/official-stockfish/Stockfish/pull/5483
bench: 1250388
2024-07-15 13:27:42 +02:00
FauziAkram and Joost VandeVondele
ec8288fe0d
Simplify away eval in TM
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 40160 W: 10523 L: 10309 D: 19328
Ptnml(0-2): 129, 4543, 10524, 4753, 131
https://tests.stockfishchess.org/tests/view/6685ab8b99271ae49479dbe9
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 195672 W: 49681 L: 49639 D: 96352
Ptnml(0-2): 112, 20976, 55597, 21060, 91
https://tests.stockfishchess.org/tests/view/6686f27a7092ade1206f7889
closes https://github.com/official-stockfish/Stockfish/pull/5445
No functional change
2024-07-06 17:54:22 +02:00
FauziAkram and Joost VandeVondele
5deb262393
Simplify rm.averageScore calculation
...
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 485056 W: 125222 L: 125497 D: 234337
Ptnml(0-2): 1384, 58197, 123614, 57976, 1357
https://tests.stockfishchess.org/tests/view/6681816d442423e54714133f
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 56622 W: 14301 L: 14115 D: 28206
Ptnml(0-2): 31, 6259, 15538, 6459, 24
https://tests.stockfishchess.org/tests/view/6681a9a5596d543edc677490
closes https://github.com/official-stockfish/Stockfish/pull/5423
bench: 1171203
2024-07-01 20:01:05 +02:00
FauziAkram and Joost VandeVondele
b2a12917e2
Remove redundant inline
...
constexpr implies inline anyway
closes https://github.com/official-stockfish/Stockfish/pull/5406
No functional change
2024-07-01 19:40:04 +02:00
FauziAkram and Joost VandeVondele
cc992e5e4a
Internal iterative reductions: decrease depth more
...
For PV nodes without a ttMove, we decrease depth.
But in this patch, additionally, if the current position is found in the TT, and the stored depth in the TT is greater than or equal to
the current search depth, we decrease the search depth even further.
Passed STC:
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 84384 W: 22154 L: 21761 D: 40469
Ptnml(0-2): 292, 9972, 21315, 10277, 336
https://tests.stockfishchess.org/tests/view/666b0a4d602682471b064db6
Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 92106 W: 23471 L: 23032 D: 45603
Ptnml(0-2): 79, 10155, 25154, 10578, 87
https://tests.stockfishchess.org/tests/view/666c423d602682471b064e56
closes https://github.com/official-stockfish/Stockfish/pull/5397
bench: 1038234
2024-06-23 11:46:41 +02:00
FauziAkram and Joost VandeVondele
2046c92ad4
Tweak the reduction formula
...
Tweak the reduction formula if position is or has been on the PV
Taking inspiration from an old Viren test.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 78528 W: 20607 L: 20225 D: 37696
Ptnml(0-2): 262, 9297, 19785, 9637, 283
https://tests.stockfishchess.org/tests/view/666339c70ff7cb4868d1fe24
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 138630 W: 35666 L: 35132 D: 67832
Ptnml(0-2): 118, 15345, 37835, 15919, 98
https://tests.stockfishchess.org/tests/view/66645dec0612cd151f9e77b0
closes https://github.com/official-stockfish/Stockfish/pull/5385
Bench: 1134281
2024-06-15 12:13:59 +02:00
FauziAkram and Disservin
e2be0aaf67
Tweak pruning formula
...
Tweak pruning formula, including a constant. I started from an old
yellow patch, if I'm not mistaken by Viz (Unfortunately I lost the link)
where he tried something similar.
I worked on it, trying different variations, until I came up with a good
configuration to pass.
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 213120 W: 55351 L: 54778 D: 102991
Ptnml(0-2): 572, 25209, 54437, 25758, 584
https://tests.stockfishchess.org/tests/view/6660c9a7c340c8eed7758195
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 315324 W: 80176 L: 79284 D: 155864
Ptnml(0-2): 155, 34711, 87030, 35619, 147
https://tests.stockfishchess.org/tests/view/6660d7bb6489614cdad13d66
closes https://github.com/official-stockfish/Stockfish/pull/5370
Bench: 1231853
2024-06-08 23:28:07 +02:00
FauziAkram and Disservin
924a843594
Simplify recapture extension
...
Simplifying the extension formula by removing the move == ttMove
condition.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 47328 W: 12324 L: 12117 D: 22887
Ptnml(0-2): 134, 5532, 12097, 5795, 106
https://tests.stockfishchess.org/tests/view/665ca5e6fd45fb0f907c41be
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 72126 W: 18378 L: 18209 D: 35539
Ptnml(0-2): 36, 7841, 20130, 8030, 26
https://tests.stockfishchess.org/tests/view/665cb276fd45fb0f907c41f9
closes https://github.com/official-stockfish/Stockfish/pull/5341
Bench: 1399468
2024-06-03 23:17:09 +02:00
FauziAkram and Disservin
3d6756769c
Simplify continuation histories
...
Functional simplification.
Simplify continuation histories, therefore increasing the effect of
stats updates and movepicker bonuses for continuation history 3 plies
deep.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 229184 W: 59087 L: 59080 D: 111017
Ptnml(0-2): 554, 27248, 59002, 27213, 575
https://tests.stockfishchess.org/tests/view/665c7a09fd45fb0f907c223b
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 44532 W: 11419 L: 11223 D: 21890
Ptnml(0-2): 18, 4787, 12457, 4989, 15
https://tests.stockfishchess.org/tests/view/665c8842fd45fb0f907c23ec
closes https://github.com/official-stockfish/Stockfish/pull/5339
Bench: 1326444
2024-06-03 23:12:13 +02:00
FauziAkram and Joost VandeVondele
ec1cda1d81
Simplify histories movepick formula
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 81440 W: 21100 L: 20929 D: 39411
Ptnml(0-2): 248, 9659, 20718, 9864, 231
https://tests.stockfishchess.org/tests/view/6659a8b7ea624d64ea5f3208
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 85758 W: 21763 L: 21607 D: 42388
Ptnml(0-2): 34, 9606, 23463, 9722, 54
https://tests.stockfishchess.org/tests/view/6659d7bff426908fcc6b692c
closes https://github.com/official-stockfish/Stockfish/pull/5326
bench: 1280472
2024-06-01 20:08:08 +02:00
FauziAkram and Joost VandeVondele
de1ae4949d
Tweak first picked move (ttMove) reduction rule
...
Tweak first picked move (ttMove) reduction rule:
Instead of always resetting the reduction to 0, we now only do so if the current reduction is less than 2.
If the current reduction is 2 or more, we decrease it by 2 instead.
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 109504 W: 28340 L: 27919 D: 53245
Ptnml(0-2): 305, 12848, 28028, 13263, 308
https://tests.stockfishchess.org/tests/view/6658c2fa6b0e318cefa900c2
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 130410 W: 33248 L: 32738 D: 64424
Ptnml(0-2): 53, 14139, 36328, 14615, 70
https://tests.stockfishchess.org/tests/view/6658dd8a6b0e318cefa90173
closes https://github.com/official-stockfish/Stockfish/pull/5321
bench: 1224588
2024-06-01 19:53:13 +02:00
FauziAkram and Disservin
02eae52833
Simplifying the malus for putting piece en prise formula
...
Simplifying the malus for putting piece en prise
formula by merging the minor pieces and pawns
(removing the pawn exclusion from the formula).
Passed STC:
https://tests.stockfishchess.org/tests/view/66578d9c6b0e318cefa8d441
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 314272 W: 80705 L: 80786 D: 152781
Ptnml(0-2): 873, 37577, 80366, 37398, 922
Passed LTC (before rebasing):
https://tests.stockfishchess.org/tests/view/6657b5ee6b0e318cefa8d6ab
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 117000 W: 29447 L: 29324 D: 58229
Ptnml(0-2): 47, 12877, 32535, 12988, 53
Passed LTC (also after rebasing):
https://tests.stockfishchess.org/tests/view/6658803d6b0e318cefa8fd99
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 244992 W: 61807 L: 61814 D: 121371
Ptnml(0-2): 125, 27420, 67414, 27411, 126
closes https://github.com/official-stockfish/Stockfish/pull/5316
Bench: 1484840
2024-05-30 23:00:22 +02:00
FauziAkram and Disservin
d1a71fdaa7
Functional simplification in the transposition table
...
Passed STC:
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 154848 W: 39838 L: 39750 D: 75260
Ptnml(0-2): 404, 16214, 44087, 16328, 391
https://tests.stockfishchess.org/tests/view/664892b088b8c6a2bbe430fc
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 68172 W: 17296 L: 17137 D: 33739
Ptnml(0-2): 23, 6349, 21185, 6504, 25
https://tests.stockfishchess.org/tests/view/6648aabfa0781149e383e526
closes https://github.com/official-stockfish/Stockfish/pull/5263
Bench: 1623228
2024-05-30 22:53:20 +02:00
FauziAkram and Joost VandeVondele
0ea6337ccf
Remove Queen threatenedByMinor
...
Remove Queen threatenedByMinor from movepick
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 54432 W: 14053 L: 13855 D: 26524
Ptnml(0-2): 124, 6347, 14090, 6517, 138
https://tests.stockfishchess.org/tests/view/66578d036b0e318cefa8d43d
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 198168 W: 49979 L: 49940 D: 98249
Ptnml(0-2): 84, 21824, 55236, 21849, 91
https://tests.stockfishchess.org/tests/view/66579cf86b0e318cefa8d5b1
closes https://github.com/official-stockfish/Stockfish/pull/5306
bench: 1342438
2024-05-30 14:21:28 +02:00
FauziAkram and Disservin
41acbcae1a
Simplifying malus for putting piece en prise formula
...
Patch author: @ehsanrashid
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 116192 W: 30229 L: 30094 D: 55869
Ptnml(0-2): 451, 13880, 29351, 13911, 503
https://tests.stockfishchess.org/tests/view/66510a40a86388d5e27da936
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 441312 W: 111009 L: 111220 D: 219083
Ptnml(0-2): 217, 49390, 121659, 49167, 223
https://tests.stockfishchess.org/tests/view/66530696a86388d5e27da9e3
closes https://github.com/official-stockfish/Stockfish/pull/5304
Bench: 1987574
2024-05-29 18:55:30 +02:00
FauziAkram and Joost VandeVondele
d0b9411b82
Tweak return value in futility pruning
...
Tweak the return value formula in futility pruning.
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 60544 W: 15791 L: 15440 D: 29313
Ptnml(0-2): 193, 7024, 15520, 7309, 226
https://tests.stockfishchess.org/tests/view/6654ef22a86388d5e27db122
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 126426 W: 32317 L: 31812 D: 62297
Ptnml(0-2): 55, 13871, 34869, 14350, 68
https://tests.stockfishchess.org/tests/view/66550644a86388d5e27db649
closes https://github.com/official-stockfish/Stockfish/pull/5295
bench: 1856147
2024-05-28 18:30:24 +02:00
FauziAkram and Joost VandeVondele
87bad0c38a
Refine Evaluation Scaling with Piece-Specific Weights
...
Refine Evaluation Scaling with Piece-Specific Weights, instead of the simplified npm method.
I took the initial idea from Viren6 , as he worked on it in September of last year.
I worked on it, and tuned it, and now it passed both tests.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 95712 W: 24731 L: 24325 D: 46656
Ptnml(0-2): 363, 11152, 24357, 11684, 300
https://tests.stockfishchess.org/tests/view/664b5493830eb9f886614af3
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 204480 W: 52167 L: 51501 D: 100812
Ptnml(0-2): 114, 22579, 56166, 23289, 92
https://tests.stockfishchess.org/tests/view/664b75dd830eb9f886614b44
closes https://github.com/official-stockfish/Stockfish/pull/5277
Bench: 1384337
2024-05-21 08:44:59 +02:00
FauziAkram and Joost VandeVondele
b8ccaf038a
Use same shuffling Constant for both nets
...
Passed STC:
https://tests.stockfishchess.org/tests/view/664a42b15fc7b70b8817aeef
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 87840 W: 22759 L: 22594 D: 42487
Ptnml(0-2): 335, 10351, 22324, 10634, 276
Passed LTC:
https://tests.stockfishchess.org/tests/view/664a46995fc7b70b8817af02
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 163122 W: 41443 L: 41367 D: 80312
Ptnml(0-2): 105, 18154, 44927, 18310, 65
closes https://github.com/official-stockfish/Stockfish/pull/5273
bench: 1190174
2024-05-21 08:27:16 +02:00
FauziAkram and Joost VandeVondele
f5e15441b8
Early Exit in Bitboards::sliding_attack()
...
he original code checks for occupancy within the loop condition. By moving this check inside the loop and adding an early exit condition, we can avoid unnecessary iterations if a blocking piece is encountered.
Passed stc:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 127200 W: 33129 L: 32700 D: 61371
Ptnml(0-2): 424, 13243, 35826, 13694, 413
https://tests.stockfishchess.org/tests/view/664646006dcff0d1d6b05bca
closes https://github.com/official-stockfish/Stockfish/pull/5256
No functional change
2024-05-18 09:24:23 +02:00
FauziAkram and Disservin
dcb0233784
Simplifying improving and worsening deduction formulas
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 77696 W: 20052 L: 19878 D: 37766
Ptnml(0-2): 222, 9124, 19994, 9274, 234
https://tests.stockfishchess.org/tests/view/66440032bc537f561945171e
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 234414 W: 58874 L: 58871 D: 116669
Ptnml(0-2): 96, 26147, 64742, 26102, 120
https://tests.stockfishchess.org/tests/view/6644094cbc537f5619451735
closes https://github.com/official-stockfish/Stockfish/pull/5248
Bench: 1336738
2024-05-15 16:27:03 +02:00
FauziAkram and Disservin
fa114266fa
Add extra bonus for high-depth condition
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 54208 W: 14058 L: 13717 D: 26433
Ptnml(0-2): 166, 6277, 13885, 6602, 174
https://tests.stockfishchess.org/tests/view/664136d8f9f4e8fc783c9b82
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 112548 W: 28492 L: 28018 D: 56038
Ptnml(0-2): 53, 12186, 31318, 12668, 49
https://tests.stockfishchess.org/tests/view/664143fef9f4e8fc783c9bf6
closes https://github.com/official-stockfish/Stockfish/pull/5242
Bench: 1725980
2024-05-15 16:13:43 +02:00
574ad14b32
Simplify depth formula based on score improvement
...
Simplify depth formula based on score improvement.
This idea was first tried by cj5716
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 347104 W: 89683 L: 89804 D: 167617
Ptnml(0-2): 1357, 38824, 93307, 38711, 1353
https://tests.stockfishchess.org/tests/view/66378edf9819650825aa75d0
Passed LTC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 63000 W: 15851 L: 15694 D: 31455
Ptnml(0-2): 22, 5396, 20499, 5569, 14
https://tests.stockfishchess.org/tests/view/663c04e5c0b75d7f7b97d461
closes https://github.com/official-stockfish/Stockfish/pull/5225
Bench: 2691699
Co-Authored-By: cj5716 <125858804+cj5716@users.noreply.github.com >
2024-05-09 09:00:32 +02:00
FauziAkram and Joost VandeVondele
9d6dab06a8
simplify moveCountPruning
...
no (significant) speedup upon renewed testing
Passed stc:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 88992 W: 22779 L: 22633 D: 43580
Ptnml(0-2): 137, 8706, 26681, 8818, 154
https://tests.stockfishchess.org/tests/view/6636c4844b68b70d85800dae
closes https://github.com/official-stockfish/Stockfish/pull/5213
No functional change.
2024-05-09 08:48:29 +02:00
FauziAkram and Joost VandeVondele
3bdfa0fb4a
Depth dependent statscore based reductions
...
Test a modification of Fawzi's PR #5223 , against that PR.
parameters locally tuned with nevergrad4sf.
passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 1047424 W: 271478 L: 269649 D: 506297
Ptnml(0-2): 3851, 124543, 265290, 125982, 4046
https://tests.stockfishchess.org/tests/view/663b0889ca93dad645f7c58c
passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 796236 W: 201712 L: 199825 D: 394699
Ptnml(0-2): 361, 88381, 218778, 90206, 392
https://tests.stockfishchess.org/tests/view/663be6adca93dad645f7f509
https://github.com/official-stockfish/Stockfish/pull/5228
Bench: 3346224
2024-05-09 08:29:33 +02:00
FauziAkram and Joost VandeVondele
2d5e248f58
Tweak reduction formula based on depth
...
The idea came to me by checking for trends from the megafauzi tunes, since the values of the divisor for this specific formula were as follows:
stc: 15990
mtc: 16117
ltc: 14805
vltc: 12719
new vltc passed by Muzhen: 12076
This shows a clear trend related to time control, the higher it is, the lower the optimum value for the divisor seems to be.
So I tried a simple formula, using educated guesses based on some calculations, tests show it works pretty fine, and it can still be further tuned at VLTC in the future to scale even better.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 431360 W: 110791 L: 109898 D: 210671
Ptnml(0-2): 1182, 50846, 110698, 51805, 1149
https://tests.stockfishchess.org/tests/view/663770409819650825aa269f
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 114114 W: 29109 L: 28625 D: 56380
Ptnml(0-2): 105, 12628, 31101, 13124, 99
https://tests.stockfishchess.org/tests/view/66378c099819650825aa73f6
https://github.com/official-stockfish/Stockfish/pull/5223
bench: 2273551
2024-05-09 08:26:35 +02:00
FauziAkram and Joost VandeVondele
d712ed38d1
Simplify shuffling and optimism divisors to constants
...
Shuffling divisor and Optimism divisors passed STC & LTC separately:
shuf STC: https://tests.stockfishchess.org/tests/view/66356316b4e9bdbc7228b995
shuf LTC: https://tests.stockfishchess.org/tests/view/6635815a73559a8aa857c1dc
opt STC: https://tests.stockfishchess.org/tests/view/66356326b4e9bdbc7228b9a0
opt LTC: https://tests.stockfishchess.org/tests/view/663615c673559a8aa8589f8a
And then passed LTC together:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 178278 W: 45039 L: 44979 D: 88260
Ptnml(0-2): 43, 19776, 49460, 19798, 62
https://tests.stockfishchess.org/tests/view/66363f19cdb7cf5da64e22a3
closes https://github.com/official-stockfish/Stockfish/pull/5212
Bench: 2198243
2024-05-05 13:02:42 +02:00
FauziAkram and Disservin
fcba524793
Tune Search Parameters
...
Parameters Tune, adding also another tunable parameter (npmDiv) to be
variable for different nets (bignet, smallnet, psqtOnly smallnet). P.s:
The changed values are only the parameters where there is agreement
among the different time controls, so in other words, the tunings are
telling us that changing these specific values to this specific
direction is good in all time controls, so there shouldn't be a high
risk of regressing at longer time controls.
Passed STC:
LLR: 2.97 (-2.94,2.94) <0.00,2.00>
Total: 39552 W: 10329 L: 9999 D: 19224
Ptnml(0-2): 156, 4592, 9989, 4844, 195
https://tests.stockfishchess.org/tests/view/661be9a0bd68065432a088c0
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 56394 W: 14439 L: 14078 D: 27877
Ptnml(0-2): 30, 6152, 15480, 6497, 38
https://tests.stockfishchess.org/tests/view/661c746296961e72eb565406
closes https://github.com/official-stockfish/Stockfish/pull/5187
Bench: 1836777
2024-04-24 18:24:01 +02:00
FauziAkram and Joost VandeVondele
249eec6715
Simplify the depth-dependent part of the best value adjustment formula in main search
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 139648 W: 36171 L: 36061 D: 67416
Ptnml(0-2): 545, 16685, 35282, 16739, 573
https://tests.stockfishchess.org/tests/view/660d953b8ff4a059828d625d
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 222894 W: 56519 L: 56505 D: 109870
Ptnml(0-2): 112, 25145, 60971, 25055, 164
https://tests.stockfishchess.org/tests/view/660fd4afbfeb43334bf7d558
closes https://github.com/official-stockfish/Stockfish/pull/5164
bench: 1479416
2024-04-11 22:47:40 +02:00
FauziAkram and Disservin
d49b3738bc
Tweak the stats bonus and malus
...
For depth 1 we don't have a negative score anymore.
Passed STC:
https://tests.stockfishchess.org/tests/view/65fb055c0ec64f0526c5024f
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 117120 W: 30468 L: 30023 D: 56629
Ptnml(0-2): 526, 13759, 29539, 14216, 520
Passed LTC:
https://tests.stockfishchess.org/tests/view/65fdca4b0ec64f0526c5293f
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 54816 W: 13955 L: 13595 D: 27266
Ptnml(0-2): 30, 6046, 14897, 6404, 31
closes https://github.com/official-stockfish/Stockfish/pull/5134
Bench: 1876428
2024-03-26 18:17:00 +01:00
FauziAkram and Disservin
627974c99f
Search + Eval + Movepick Tune
...
Passed STC:
https://tests.stockfishchess.org/tests/view/65ef15220ec64f0526c44b04
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 24480 W: 6459 L: 6153 D: 11868
Ptnml(0-2): 101, 2798, 6184, 3008, 149
Passed LTC:
https://tests.stockfishchess.org/tests/view/65ef4bac0ec64f0526c44f50
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 53316 W: 13561 L: 13203 D: 26552
Ptnml(0-2): 27, 5925, 14408, 6259, 39
closes https://github.com/official-stockfish/Stockfish/pull/5104
Bench: 1715522
2024-03-12 16:47:11 +01:00
FauziAkram and Disservin
daa3ef9148
Simplify increaseDepth to boolean expression
...
Non-functional Simplification, maintaining the same logic as before. Big thanks
to @peregrineshahin for helping with the code.
Passed non-regression bounds:
https://tests.stockfishchess.org/tests/view/65ec93860ec64f0526c42375
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 101088 W: 26196 L: 26047 D: 48845
Ptnml(0-2): 405, 11580, 26473, 11633, 453
closes https://github.com/official-stockfish/Stockfish/pull/5103
No functional change
2024-03-12 16:43:10 +01:00
FauziAkram and Disservin
a96b0d4609
Update elo estimates
...
Tests used to change the elo worth of some functions:
https://tests.stockfishchess.org/tests/view/65c3f69dc865510db0283eef
https://tests.stockfishchess.org/tests/view/65c3f935c865510db0283f2a
https://tests.stockfishchess.org/tests/view/65d1489f1d8e83c78bfd7dbf
https://tests.stockfishchess.org/tests/view/65ce9d361d8e83c78bfd4951
https://tests.stockfishchess.org/tests/view/65cfcd901d8e83c78bfd6184
closes https://github.com/official-stockfish/Stockfish/pull/5089
No functional change
2024-03-07 19:53:48 +01:00
FauziAkram and Disservin
a615efb19f
Simplify Time Management
...
Instead of having a formula for using extra time with larger increments.
Simply set it to 1 when the increment is lower than 0.5s and to 1.1 when
the increment is higher.
The values can later on be further improved.
Passed STC:
https://tests.stockfishchess.org/tests/view/65d25d3c1d8e83c78bfd9293
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 27488 W: 7077 L: 6848 D: 13563
Ptnml(0-2): 96, 3041, 7267, 3218, 122
Passed LTC:
https://tests.stockfishchess.org/tests/view/65d2a72c1d8e83c78bfd97fa
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 137568 W: 34612 L: 34512 D: 68444
Ptnml(0-2): 60, 14672, 39221, 14770, 61
Passed VLTC:
https://tests.stockfishchess.org/tests/view/65d7d7d39b2da0226a5a205b
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 139650 W: 35229 L: 35134 D: 69287
Ptnml(0-2): 33, 14227, 41218, 14306, 41
Passed also the TCEC TC style suggested by vondele:
https://tests.stockfishchess.org/tests/view/65e4ca73416ecd92c162a57d
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 134150 W: 34278 L: 34163 D: 65709
Ptnml(0-2): 561, 15727, 34444, 15722, 621
closes https://github.com/official-stockfish/Stockfish/pull/5076
Bench: 1553115
2024-03-07 19:49:01 +01:00
FauziAkram and Disservin
59691d46a1
Assorted trivial cleanups
...
Renaming doubleExtensions variable to multiExtensions, since now we have also triple extensions.
Some extra cleanups.
Recent tests used to measure the elo worth:
https://tests.stockfishchess.org/tests/view/659fd0c379aa8af82b96abc3
https://tests.stockfishchess.org/tests/view/65a8f3da79aa8af82b9751e3
https://tests.stockfishchess.org/tests/view/65b51824c865510db0272740
https://tests.stockfishchess.org/tests/view/65b58fbfc865510db0272f5b
closes https://github.com/official-stockfish/Stockfish/pull/5032
No functional change
2024-02-09 19:06:24 +01:00
FauziAkram and Joost VandeVondele
56b342f9b2
Simplify the extension formula
...
Simplify the extension formula in the case of cutNode by removing the depth condition and always setting extension to -2.
Passed STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 277280 W: 70760 L: 70802 D: 135718
Ptnml(0-2): 971, 31775, 73153, 31807, 934
https://tests.stockfishchess.org/tests/view/65ad08f779aa8af82b979dd6
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 452976 W: 112992 L: 113215 D: 226769
Ptnml(0-2): 266, 51041, 124112, 50788, 281
https://tests.stockfishchess.org/tests/view/65ae466fc865510db026a760
closes https://github.com/official-stockfish/Stockfish/pull/5021
Bench: 1492957
2024-02-03 17:09:05 +01:00
FauziAkram and Disservin
3d49a99aaf
Refactor history score calculation
...
Passed STC:
https://tests.stockfishchess.org/tests/view/65ad08b179aa8af82b979dd1
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 161376 W: 41582 L: 41498 D: 78296
Ptnml(0-2): 633, 19354, 40611, 19476, 614
Passed LTC:
https://tests.stockfishchess.org/tests/view/65af966fc865510db026c0f0
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 116526 W: 29269 L: 29143 D: 58114
Ptnml(0-2): 71, 13252, 31509, 13342, 89
closes https://github.com/official-stockfish/Stockfish/pull/5006
Bench: 1317504
2024-01-26 20:44:16 +01:00
FauziAkram and Disservin
2b62c4452d
Remove redundant max operation on lmrDepth
...
Removed a restriction that prohibited history heuristics sum in futility
pruning to exceed some negative value.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 279040 W: 71095 L: 71143 D: 136802
Ptnml(0-2): 949, 33574, 70474, 33622, 901
https://tests.stockfishchess.org/tests/view/65aaef4c79aa8af82b977631
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 75156 W: 18884 L: 18715 D: 37557
Ptnml(0-2): 52, 8445, 20408, 8628, 45
https://tests.stockfishchess.org/tests/view/65ae7ef3c865510db026abf5
closes https://github.com/official-stockfish/Stockfish/pull/5004
Bench: 1566543
2024-01-26 20:40:22 +01:00
FauziAkram and Disservin
9a9702d668
Remove threatenedByPawn from rook threat
...
Can be simplified away.
Passed STC:
https://tests.stockfishchess.org/tests/view/65a3fa4179aa8af82b96face
LLR: 2.92 (-2.94,2.94) <-1.75,0.25>
Total: 30592 W: 7903 L: 7674 D: 15015
Ptnml(0-2): 96, 3590, 7711, 3787, 112
Passed LTC:
https://tests.stockfishchess.org/tests/view/65a42b9a79aa8af82b96fe88
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 73656 W: 18382 L: 18212 D: 37062
Ptnml(0-2): 47, 8287, 19981, 8475, 38
closes https://github.com/official-stockfish/Stockfish/pull/4993
Bench: 1430061
2024-01-17 18:55:44 +01:00
FauziAkram and Disservin
3372ee9c26
Remove threatenedByPawn term for queen threats
...
Passed STC:
https://tests.stockfishchess.org/tests/view/659d614c79aa8af82b9677d0
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 151776 W: 38690 L: 38597 D: 74489
Ptnml(0-2): 522, 17841, 39015, 18042, 468
Passed LTC:
https://tests.stockfishchess.org/tests/view/659d94d379aa8af82b967cb2
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 91908 W: 23075 L: 22924 D: 45909
Ptnml(0-2): 70, 10311, 25037, 10470, 66
closes https://github.com/official-stockfish/Stockfish/pull/4977
Bench: 1266493
2024-01-13 19:40:53 +01:00
FauziAkram and Disservin
8b4583bce7
Remove redundant int cast
...
Remove a redundant int cast in the calculation of fwdOut. The variable
OutputType is already defined as std::int32_t, which is an integer type, making
the cast unnecessary.
closes https://github.com/official-stockfish/Stockfish/pull/4961
No functional change
2024-01-04 15:56:53 +01:00
FauziAkram and Disservin
5546bc0a26
Simplification of partial_insertion_sort formula.
...
Passed STC:
https://tests.stockfishchess.org/tests/view/6590110879aa8af82b9562e9
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 134880 W: 34468 L: 34355 D: 66057
Ptnml(0-2): 476, 16060, 34220, 16243, 441
Passed LTC:
https://tests.stockfishchess.org/tests/view/659156ca79aa8af82b957f07
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 60780 W: 15179 L: 14996 D: 30605
Ptnml(0-2): 27, 6847, 16464, 7020, 32
closes https://github.com/official-stockfish/Stockfish/pull/4955
Bench: 1338331
2024-01-04 15:47:37 +01:00
FauziAkram and Disservin
4ff297a6df
Mark square_bb() as constexpr
...
closes https://github.com/official-stockfish/Stockfish/pull/4949
No functional change
2023-12-31 19:58:10 +01:00
FauziAkram and Disservin
1fe562fdf3
Simplify the improving flag calculation
...
Passed STC:
https://tests.stockfishchess.org/tests/view/658ec29979aa8af82b9547f6
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 93408 W: 23747 L: 23587 D: 46074
Ptnml(0-2): 340, 11178, 23527, 11300, 359
Passed LTC:
https://tests.stockfishchess.org/tests/view/658f73e479aa8af82b9555b6
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 64026 W: 15984 L: 15806 D: 32236
Ptnml(0-2): 31, 7113, 17552, 7281, 36
closes https://github.com/official-stockfish/Stockfish/pull/4948
Bench: 1143749
2023-12-31 19:57:34 +01:00
FauziAkram and Disservin
833a2e2bc0
Cleanup comments
...
Tests used to derive some Elo worth comments:
https://tests.stockfishchess.org/tests/view/656a7f4e136acbc573555a31
https://tests.stockfishchess.org/tests/view/6585fb455457644dc984620f
closes https://github.com/official-stockfish/Stockfish/pull/4945
No functional change
2023-12-31 19:54:27 +01:00
FauziAkram and Disservin
bab1cc300c
Refactor bestvalue adjustment in qsearch
...
closes https://github.com/official-stockfish/Stockfish/pull/4935
No functional change
2023-12-30 11:05:19 +01:00
FauziAkram and Disservin
fbdf5d94a9
Tweak quiet move bonus
...
Improving quiet move bonus by replacing bestvalue and alpha comparison, with
checking the statScore of the previous search step instead.
Inspired by @locutus2
Passed STC:
https://tests.stockfishchess.org/tests/view/657f22fb893104ee25b614e8
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 51296 W: 13121 L: 12774 D: 25401
Ptnml(0-2): 225, 5986, 12868, 6355, 214
Passed LTC:
https://tests.stockfishchess.org/tests/view/658024a2893104ee25b62587
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 82758 W: 20606 L: 20189 D: 41963
Ptnml(0-2): 51, 9149, 22555, 9580, 44
closes https://github.com/official-stockfish/Stockfish/pull/4930
Bench: 1312822
2023-12-22 11:51:08 +01:00
a069a1bbbf
Use std::abs over abs
...
closes https://github.com/official-stockfish/Stockfish/pull/4926
closes https://github.com/official-stockfish/Stockfish/pull/4909
No functional change
Co-Authored-By: fffelix-huang <72808219+fffelix-huang@users.noreply.github.com >
2023-12-19 18:22:10 +01:00
FauziAkram and Disservin
07a2619b62
Improvement of Time Management Parameters
...
Passed STC:
https://tests.stockfishchess.org/tests/view/6579c5574d789acf40aaf914
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 44672 W: 11354 L: 11030 D: 22288
Ptnml(0-2): 140, 5033, 11685, 5319, 159
Passed LTC:
https://tests.stockfishchess.org/tests/view/657ad7f44d789acf40ab105e
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 40932 W: 10275 L: 9950 D: 20707
Ptnml(0-2): 21, 4316, 11473, 4629, 27
Passed non-regression Sudden death 10+0:
https://tests.stockfishchess.org/tests/view/657b9b9e393ac02e7911f1a8
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 21384 W: 5171 L: 4925 D: 11288
Ptnml(0-2): 112, 2420, 5409, 2612, 139
closes https://github.com/official-stockfish/Stockfish/pull/4923
No functional change
2023-12-19 18:22:10 +01:00
FauziAkram and Disservin
536d692a30
Remove SlowMover Option
...
The SlowMover option allows users to modify the timeLeft variant, impacting the
engine's time management. However, this feature, while theoretically flexible,
doesn't offer substantial benefits. Instead, it introduces the risk of
non-experienced users altering values without a clear understanding of the
effects, potentially leading to a weaker engine.
The vast majority of SF users don't use it anyway, and based on tests conducted
by fauzi several months ago suggest that changing it would only lose Elo.
Examples:
https://tests.stockfishchess.org/tests/view/651f309bac57711436726bba
https://tests.stockfishchess.org/tests/view/651fea29ac57711436727d85
https://tests.stockfishchess.org/tests/view/65257c343125598fc7eb68a1
https://tests.stockfishchess.org/tests/view/652296c83125598fc7eb2ad7
Tune:
https://tests.stockfishchess.org/tests/view/652a70313125598fc7ebd706
(keeping the value at 100, zz2)
closes https://github.com/official-stockfish/Stockfish/pull/4917
No functional change
2023-12-14 18:44:46 +01:00
FauziAkram and Disservin
7a8bcfc229
Remove cutNode condition
...
cutNode condition seems to be irrelevant.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 24224 W: 6206 L: 5970 D: 12048
Ptnml(0-2): 69, 2818, 6122, 3014, 89
https://tests.stockfishchess.org/tests/view/65686910136acbc5735529ec
Passed LTC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 236538 W: 58624 L: 58622 D: 119292
Ptnml(0-2): 136, 26955, 64091, 26945, 142
https://tests.stockfishchess.org/tests/view/6568925a136acbc573552d8f
closes https://github.com/official-stockfish/Stockfish/pull/4901
Bench: 1244386
2023-12-04 11:33:58 +01:00
FauziAkram and Disservin
7dc40ac643
Simplify quietMoveMalus malus
...
Use a simple depth instead of depth + 1 in the quietMoveMalus formula.
Passed STC:
https://tests.stockfishchess.org/tests/view/65636bf0136acbc57354b662
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 105248 W: 26680 L: 26532 D: 52036
Ptnml(0-2): 409, 12590, 26481, 12732, 412
Passed LTC:
https://tests.stockfishchess.org/tests/view/6563b5db136acbc57354bcab
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 204204 W: 50200 L: 50166 D: 103838
Ptnml(0-2): 123, 23331, 55145, 23395, 108
closes https://github.com/official-stockfish/Stockfish/pull/4893
Bench: 1717495
2023-12-02 11:40:36 +01:00
FauziAkram and Disservin
f17db4641e
Simplify doDeeperSearch
...
Removing dependence on d simplifies the doDeeperSearch formula and eliminates a
variable that is not necessary in this context.
Passed STC:
https://tests.stockfishchess.org/tests/view/65647980136acbc57354c9f6
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 37440 W: 9558 L: 9334 D: 18548
Ptnml(0-2): 127, 4439, 9375, 4641, 138
Passed LTC:
https://tests.stockfishchess.org/tests/view/6564c3f0136acbc57354d126
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 113946 W: 27993 L: 27864 D: 58089
Ptnml(0-2): 67, 12975, 30783, 13058, 90
closes https://github.com/official-stockfish/Stockfish/pull/4888
Bench: 1427733
2023-12-02 11:35:28 +01:00
FauziAkram and Disservin
b4e9ee72e3
Reformat some comments
...
Tests used to derive some Elo worth comments:
https://tests.stockfishchess.org/tests/view/653cf6b7cc309ae83956263a
https://tests.stockfishchess.org/tests/view/655250b7136acbc573534711
https://tests.stockfishchess.org/tests/view/65525767136acbc5735347b9
https://tests.stockfishchess.org/tests/view/65525aa1136acbc573534801
closes https://github.com/official-stockfish/Stockfish/pull/4879
No functional change
2023-11-20 19:10:38 +01:00
FauziAkram and Disservin
b59786e750
Remove doEvenDeeperSearch
...
Passed STC:
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 51040 W: 13014 L: 12804 D: 25222
Ptnml(0-2): 166, 6032, 12917, 6236, 169
https://tests.stockfishchess.org/tests/view/65525aa1136acbc573534801
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 165168 W: 40863 L: 40789 D: 83516
Ptnml(0-2): 73, 18783, 44792, 18869, 67
https://tests.stockfishchess.org/tests/view/65535af5136acbc573535c84
closes https://github.com/official-stockfish/Stockfish/pull/4880
Bench: 1477007
2023-11-20 19:00:47 +01:00
FauziAkram and Disservin
504bf0e8b8
Change depth - 1 to newDepth
...
Replacing 'depth - 1' with 'newDepth' in the singularbeta formula
utilizes existing variables more succinctly.
closes https://github.com/official-stockfish/Stockfish/pull/4876
No functional change
2023-11-20 18:59:01 +01:00
FauziAkram and Joost VandeVondele
d4b46ea6db
Set reduction to 0 if the move is a TT move
...
The reduction formula currently decreases by 1 if the move is a TT move.
This changes this by just setting the reduction to 0 instead.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 83136 W: 21145 L: 20758 D: 41233
Ptnml(0-2): 279, 9772, 21090, 10137, 290
https://tests.stockfishchess.org/tests/view/653c0fbacc309ae839561584
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 273150 W: 67987 L: 67171 D: 137992
Ptnml(0-2): 155, 30730, 73966, 31592, 132
https://tests.stockfishchess.org/tests/view/653d9d02cc309ae839562fdf
closes https://github.com/official-stockfish/Stockfish/pull/4863
bench: 1110556
2023-11-05 19:53:15 +01:00
FauziAkram and Joost VandeVondele
7f97ba775e
Tweaking the futility pruning formula
...
Huge credit goes also to candirufish,
as the idea was first tried by him, and then tuned by me at multiple phases.
Tweaking the futility pruning formula to be a bit more selective about when pruning is applied.
Adjust the value added to the static eval based on the bestValue relative to ss->staticEval. If bestValue is significantly lower, we add a larger value.
Passed STC:
LLR: 2.98 (-2.94,2.94) <0.00,2.00>
Total: 37120 W: 9590 L: 9266 D: 18264
Ptnml(0-2): 130, 4301, 9385, 4603, 141
https://tests.stockfishchess.org/tests/view/6544cf90136acbc573523247
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 49632 W: 12381 L: 12033 D: 25218
Ptnml(0-2): 30, 5429, 13549, 5779, 29
https://tests.stockfishchess.org/tests/view/65453bc1136acbc573523a3c
closes https://github.com/official-stockfish/Stockfish/pull/4861
bench: 1107118
2023-11-04 17:34:35 +01:00
FauziAkram and Joost VandeVondele
101d2bb8ea
Simplifying two formulas
...
by eliminating two multiplication operations.
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 60000 W: 15193 L: 14996 D: 29811
Ptnml(0-2): 199, 7100, 15215, 7277, 209
https://tests.stockfishchess.org/tests/view/653beb69cc309ae83956129d
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 122910 W: 30471 L: 30353 D: 62086
Ptnml(0-2): 68, 13961, 33271, 14095, 60
https://tests.stockfishchess.org/tests/view/653c5848cc309ae839561ae7
closes https://github.com/official-stockfish/Stockfish/pull/4857
bench: 1216779
2023-11-03 22:40:43 +01:00
d30af4f669
Rewarding Quiet Moves that Enable Razoring
...
The main idea of the patch comes from @peregrineshahin :
https://tests.stockfishchess.org/tests/view/65205363ac57711436728781
Another small idea (tuning) comes from @Vizvezdenec
https://tests.stockfishchess.org/tests/view/652e071ade6d262d08d318f4 And a long
phases of tuning and tests was done by me in order to make the patch be able to
pass both tests.
The idea, as mentioned by Peregrine is that in our standard code, if no best
move found after searching all moves, we give a bonus to the previous move that
caused the fail high. So in razoring we assume no bestmove will be found so we
might as well do the same.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 82336 W: 20997 L: 20610 D: 40729
Ptnml(0-2): 288, 9710, 20753, 10161, 256
https://tests.stockfishchess.org/tests/view/6538fafbcc309ae83955d8f0
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 46584 W: 11753 L: 11411 D: 23420
Ptnml(0-2): 21, 5133, 12642, 5475, 21
https://tests.stockfishchess.org/tests/view/653a3f2ccc309ae83955f223
closes https://github.com/official-stockfish/Stockfish/pull/4850
Bench: 1258079
Co-Authored-By: Shahin M. Shahin <41402573+peregrineshahin@users.noreply.github.com >
2023-10-27 17:32:19 +02:00
FauziAkram and Joost VandeVondele
90c18b0b50
Removing history condition
...
Removing the bad history condition from the skip futility pruning formula.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 142688 W: 36420 L: 36317 D: 69951
Ptnml(0-2): 481, 16653, 36970, 16762, 478
https://tests.stockfishchess.org/tests/view/65270a663125598fc7eb8c67
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 435378 W: 110723 L: 110925 D: 213730
Ptnml(0-2): 278, 47251, 122788, 47139, 233
https://tests.stockfishchess.org/tests/view/6528595f3125598fc7eba8f5
closes https://github.com/official-stockfish/Stockfish/pull/4834
Bench: 1110579
2023-10-21 10:31:51 +02:00
FauziAkram and Joost VandeVondele
edb4ab924f
Standardize Comments
...
use double slashes (//) only for comments.
closes #4820
No functional change.
2023-10-21 10:25:03 +02:00
FauziAkram and Disservin
243f7b264a
Improve grammar of comments
...
closes https://github.com/official-stockfish/Stockfish/pull/4801
No functional change
2023-09-29 22:18:17 +02:00
FauziAkram and Disservin
9739ed7a97
Simplify pawn count in evaluation
...
This simplifies the evaluation by removing the unnecessary pawn count term when
combining nnue and optimism values.
Passed STC
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 61472 W: 15748 L: 15554 D: 30170
Ptnml(0-2): 191, 7123, 15933, 7279, 210
https://tests.stockfishchess.org/tests/view/650c34cf7ca0d3f7bbf264ff
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 81264 W: 20657 L: 20500 D: 40107
Ptnml(0-2): 30, 8713, 22997, 8854, 38
https://tests.stockfishchess.org/tests/view/650cc30efb151d43ae6d5987
closes https://github.com/official-stockfish/Stockfish/pull/4800
Bench: 1530568
2023-09-29 22:12:46 +02:00
FauziAkram and Stéphane Nicolet
adf29b3fd6
Rename one variable
...
To enhance code clarity and prevent potential confusion with the
'r' variable assigned to reduction later in the code, this pull
request renames it to 'reductionScale' when we use the same name
in the reduction() function.
Using distinct variable names for separate functions improves code
readability and maintainability.
closes https://github.com/official-stockfish/Stockfish/pull/4765
No functional change
2023-09-03 09:10:27 +02:00
FauziAkram and Disservin
c02ee70927
Simplify prior countermove bonus
...
Swapping a multiplication operation between two terms with a simple constant
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 60512 W: 15424 L: 15231 D: 29857
Ptnml(0-2): 200, 6985, 15712, 7140, 219
https://tests.stockfishchess.org/tests/view/64d2addf5b17f7c21c0dfae6
Passed LTC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 108456 W: 27545 L: 27414 D: 53497
Ptnml(0-2): 63, 11629, 30698, 11790, 48
https://tests.stockfishchess.org/tests/view/64d3ab6e5b17f7c21c0e1188
closes https://github.com/official-stockfish/Stockfish/pull/4738
Bench: 1636213
2023-08-13 11:48:32 +02:00
FauziAkram and Stéphane Nicolet
a26f8d37e1
Tweak formula for pruning moves losing material
...
Simplify the "Prune moves with negative SEE" formula,
by removing one multiplication and subtraction operation.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 214272 W: 54596 L: 54572 D: 105104
Ptnml(0-2): 741, 25160, 55320, 25164, 751
https://tests.stockfishchess.org/tests/view/64c430d1dc56e1650abbdbf6
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 238380 W: 60600 L: 60601 D: 117179
Ptnml(0-2): 132, 26069, 66791, 26064, 134
https://tests.stockfishchess.org/tests/view/64c81f155b17f7c21c0cee2b
closes https://github.com/official-stockfish/Stockfish/pull/4721
bench: 1655337
2023-08-06 22:25:58 +02:00
FauziAkram and Stéphane Nicolet
2667316ffc
Simplify one multicut extension
...
Simplify away the ttValue <= alpha extension in the multicut block.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 318336 W: 81307 L: 81398 D: 155631
Ptnml(0-2): 1088, 37291, 82469, 37264, 1056
https://tests.stockfishchess.org/tests/view/64b8589fdc56e1650abad61d
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 89388 W: 22925 L: 22775 D: 43688
Ptnml(0-2): 34, 9635, 25210, 9777, 38
https://tests.stockfishchess.org/tests/view/64bc41d0dc56e1650abb29cb
closes https://github.com/official-stockfish/Stockfish/pull/4709
bench: 1604592
2023-07-25 16:43:35 +02:00
FauziAkram and Joost VandeVondele
acdbf45171
Use more expressive names for bonus1 and bonus2
...
closes https://github.com/official-stockfish/Stockfish/pull/4683
No functional change
2023-07-15 09:13:02 +02:00
FauziAkram and Joost VandeVondele
9cd563cb54
Improving grammar and readability of comments
...
closes https://github.com/official-stockfish/Stockfish/pull/4643
No functional change
2023-07-03 18:38:41 +02:00
FauziAkram and Joost VandeVondele
cedd73f4aa
Simplify Futility pruning for captures
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 412928 W: 109433 L: 109620 D: 193875
Ptnml(0-2): 1071, 45929, 112650, 45744, 1070
https://tests.stockfishchess.org/tests/view/6468eac40db5177f2b76ef4d
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 190200 W: 51465 L: 51420 D: 87315
Ptnml(0-2): 58, 18585, 57788, 18592, 77
https://tests.stockfishchess.org/tests/view/646b66520db5177f2b772a84
closes https://github.com/official-stockfish/Stockfish/pull/4583
bench: 2486604
2023-05-25 20:42:43 +02:00
FauziAkram and Joost VandeVondele
a989aa1825
Simplify Prune moves with negative SEE
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 57760 W: 15472 L: 15286 D: 27002
Ptnml(0-2): 123, 6025, 16430, 6147, 155
https://tests.stockfishchess.org/tests/view/6468eb6b0db5177f2b76ef62
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 93966 W: 25274 L: 25141 D: 43551
Ptnml(0-2): 33, 8498, 29792, 8623, 37
https://tests.stockfishchess.org/tests/view/6469570b0db5177f2b76f81b
closes: https://github.com/official-stockfish/Stockfish/pull/4579
Bench: 2304063
2023-05-25 20:40:09 +02:00
FauziAkram and Joost VandeVondele
59f2085469
Depth Tweak and tuning
...
tunes reduction related parameters, and introduces more reduction on found good moves.
credit for this patch goes also to candirufish Yoshie2000 dubslow peregrineshahin Vizvezdenec
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 38424 W: 10346 L: 10040 D: 18038
Ptnml(0-2): 103, 4111, 10473, 4427, 98
https://tests.stockfishchess.org/tests/view/642ca74277ff3301150db511
Passed LTC:
LLR: 2.97 (-2.94,2.94) <0.50,2.50>
Total: 136968 W: 37151 L: 36660 D: 63157
Ptnml(0-2): 43, 13052, 41808, 13533, 48
https://tests.stockfishchess.org/tests/view/642d632377ff3301150dddbe
closes https://github.com/official-stockfish/Stockfish/pull/4499
bench: 3672914
2023-04-07 09:56:35 +02:00
FauziAkram and Joost VandeVondele
9a42bbdf31
Parameters Tweak
...
Passed STC
LLR: 3.22 (-2.94,2.94) <0.00,2.00>
Total: 664048 W: 177526 L: 176301 D: 310221
Ptnml(0-2): 2002, 72968, 180891, 74129, 2034
https://tests.stockfishchess.org/tests/view/64219901db43ab2ba6f901fa
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 77576 W: 21125 L: 20750 D: 35701
Ptnml(0-2): 24, 7350, 23669, 7717, 28
https://tests.stockfishchess.org/tests/view/642abe3377ff3301150d3a16
closes https://github.com/official-stockfish/Stockfish/pull/4493
bench: 4522076
2023-04-05 08:15:34 +02:00
FauziAkram and Joost VandeVondele
6a6e32dfc8
Decrease Depth more for positions not in TT.
...
If the position is not in TT, decrease depth by 2
or by 4 if the TT entry for the current position was hit
and the stored depth is greater than or equal to the current depth.
Many thanks to Vizvezdenec as the main idea was his.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 70664 W: 18995 L: 18639 D: 33030
Ptnml(0-2): 228, 7712, 19090, 8080, 222
https://tests.stockfishchess.org/tests/view/64258a8bdb43ab2ba6f9b682
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 85040 W: 23227 L: 22836 D: 38977
Ptnml(0-2): 26, 8115, 25867, 8466, 46
https://tests.stockfishchess.org/tests/view/64262057db43ab2ba6f9d0e7
closes https://github.com/official-stockfish/Stockfish/pull/4482
bench: 4380438
2023-04-01 16:28:52 +02:00
FauziAkram and Joost VandeVondele
b973e40e45
Update Elo estimates for terms in search
...
Setting the Elo value of some functions which were not set before.
All tests run at 10+0.1 (STC), 25000 games (Same as #4294 ).
Book used: UHO_XXL_+0.90_+1.19.epd
Values are rounded to the nearest non-negative integer.
Test links:
https://tests.stockfishchess.org/tests/view/6419ab5b65775d3b539f46c6
https://tests.stockfishchess.org/tests/view/6419adb465775d3b539f4730
https://tests.stockfishchess.org/tests/view/6419ae9c65775d3b539f4756
https://tests.stockfishchess.org/tests/view/6419b03f65775d3b539f47a8
https://tests.stockfishchess.org/tests/view/6419b35d65775d3b539f4860
https://tests.stockfishchess.org/tests/view/6419b6b965775d3b539f48e6
https://tests.stockfishchess.org/tests/view/6419cade65775d3b539f4cd5
https://tests.stockfishchess.org/tests/view/6419cbb565775d3b539f4d01
https://tests.stockfishchess.org/tests/view/6419cc6965775d3b539f4d1e
closes https://github.com/official-stockfish/Stockfish/pull/4459
No functional change
2023-03-25 09:20:58 +01:00
FauziAkram and Joost VandeVondele
fc5b59b88b
Parameter Tweaks
...
This patch is a parameter tweak that passed both STC and LTC tests.
STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 80944 W: 21557 L: 21189 D: 38198
Ptnml(0-2): 192, 8883, 22028, 9103, 266
https://tests.stockfishchess.org/tests/view/63b07fe2d421d8f75795a03b
LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 30440 W: 8296 L: 8007 D: 14137
Ptnml(0-2): 6, 2893, 9143, 3162, 16
https://tests.stockfishchess.org/tests/view/63b167d02ab1290f961644db
closes https://github.com/official-stockfish/Stockfish/pull/4318
Bench: 4182223
2023-01-02 19:14:05 +01:00
FauziAkram and Joost VandeVondele
b2bd8699ec
Update Elo estimates for terms in search
...
based on 25k games per term, using the UHO_XXL_+0.90_+1.19.epd book, at STC.
More detailed information in the PR.
closes https://github.com/official-stockfish/Stockfish/pull/4294
No functional change
2022-12-24 15:58:51 +01:00
FauziAkram and Joost VandeVondele
98965c139d
doEvenDeeperSearch + tuning
...
Credit for the main idea of doEvenDeeperSearch goes to Vizvezdenec,
tuning by FauziAkram: Expansion of existing logic of doDeeperSearch -
if value from LMR is really really good do full depth search not
1 ply deeper but rather 2 instead.
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 330048 W: 87672 L: 86942 D: 155434
Ptnml(0-2): 1012, 36739, 88912, 37229, 1132
https://tests.stockfishchess.org/tests/view/638a1cadd2b9c924c4c621d2
Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 216696 W: 57891 L: 57240 D: 101565
Ptnml(0-2): 72, 21221, 65152, 21790, 113
https://tests.stockfishchess.org/tests/view/638c7d52a971f1f096c68fe2
closes https://github.com/official-stockfish/Stockfish/pull/4256
Bench: 3461830
2022-12-08 20:41:45 +01:00
FauziAkram and Stéphane Nicolet
8bab09749d
Mix alpha and statScore for reduction
...
Idea by @xoto10, and tuning by @FauziAkram.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 57832 W: 15540 L: 15199 D: 27093
Ptnml(0-2): 207, 6343, 15477, 6680, 209
https://tests.stockfishchess.org/tests/view/6338db6f35f43d649ff60fdc
passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 50968 W: 13770 L: 13440 D: 23758
Ptnml(0-2): 25, 4905, 15306, 5211, 37
https://tests.stockfishchess.org/tests/view/6339777035f43d649ff62686
Links to the tuning sessions:
https://tests.stockfishchess.org/tests/view/63345725a004bed9a2e47b28
https://tests.stockfishchess.org/tests/view/63345728a004bed9a2e47b2a
closes https://github.com/official-stockfish/Stockfish/pull/4183
Bench: 4426602
2022-10-04 01:07:27 +02:00
FauziAkram and Joost VandeVondele
5eeb96d0e7
VLTC tuning
...
Tuning some parameters that scale well with longer time control:
Failed STC:
https://tests.stockfishchess.org/tests/view/6313424d8202a039920e130a
LLR: -2.94 (-2.94,2.94) <-1.75,0.25>
Total: 42680 W: 11231 L: 11540 D: 19909
Ptnml(0-2): 191, 5008, 11232, 4737, 172
Passed LTC:
https://tests.stockfishchess.org/tests/view/6311e2cd874169ca52ae7933
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 53448 W: 14782 L: 14437 D: 24229
Ptnml(0-2): 101, 5214, 15740, 5577, 92
Passed VLTC:
https://tests.stockfishchess.org/tests/view/6312530cfa99a92e3002c927
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 123336 W: 33465 L: 33007 D: 56864
Ptnml(0-2): 38, 11466, 38204, 11920, 40
closes https://github.com/official-stockfish/Stockfish/pull/4154
Bench: 5609606
2022-09-07 07:38:04 +02:00
FauziAkram and Joost VandeVondele
c25d4c4887
Tuning classical and NNUE scaling terms
...
changes to parameters in both classical and NNUE scaling, following up from an earlier successful #3958
passed STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.50>
Total: 23936 W: 6490 L: 6234 D: 11212
Ptnml(0-2): 107, 2610, 6306, 2810, 135
https://tests.stockfishchess.org/tests/view/625820aa33c40bb9d964e6ae
passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,3.00>
Total: 50376 W: 13629 L: 13327 D: 23420
Ptnml(0-2): 20, 4979, 14920, 5217, 52
https://tests.stockfishchess.org/tests/view/62584592c1d7f5008a33a4d1
closes https://github.com/official-stockfish/Stockfish/pull/3982
Bench: 6964954
2022-04-16 08:41:51 +02:00
FauziAkram and Joost VandeVondele
45f2416db4
Improvements in Evaluation
...
adjust parameters in classical evaluation and NNUE scaling.
STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.50>
Total: 37104 W: 9983 L: 9701 D: 17420
Ptnml(0-2): 154, 4187, 9651, 4343, 217
https://tests.stockfishchess.org/tests/view/6228cb13a9d47c8160e885ba
LTC:
LLR: 2.94 (-2.94,2.94) <0.50,3.00>
Total: 266792 W: 71101 L: 70295 D: 125396
Ptnml(0-2): 214, 26928, 78353, 27640, 261
https://tests.stockfishchess.org/tests/view/6228d3c4a9d47c8160e887b0
closes https://github.com/official-stockfish/Stockfish/pull/3958
Bench: 6739741
2022-03-12 09:25:58 +01:00
FauziAkram and Joost VandeVondele
fc8213c7df
Tuning of a Null Move Parameter
...
STC:
LLR: 2.99 (-2.94,2.94) <-0.50,2.50>
Total: 78744 W: 19956 L: 19664 D: 39124
Ptnml(0-2): 259, 9005, 20573, 9255, 280
https://tests.stockfishchess.org/tests/view/6172017a38cb9784038af947
LTC:
LLR: 2.95 (-2.94,2.94) <0.50,3.50>
Total: 68528 W: 17309 L: 16964 D: 34255
Ptnml(0-2): 41, 7194, 19455, 7527, 47
https://tests.stockfishchess.org/tests/view/6172994d38cb9784038af983
closes https://github.com/official-stockfish/Stockfish/pull/3756
bench: 6689428
2021-10-23 12:27:32 +02:00
FauziAkram and Joost VandeVondele
5ebdc40f83
Pawns Tuning
...
A simple tuning of Pawns parameters, and some PSQT changes.
Passed STC:
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 219424 W: 43681 L: 43103 D: 132640
Ptnml(0-2): 4014, 25760, 49669, 26172, 4097
https://tests.stockfishchess.org/tests/view/601bce167f517a561bc491eb
Passed LTC:
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 317312 W: 42525 L: 41579 D: 233208
Ptnml(0-2): 2447, 30157, 92636, 30835, 2581
https://tests.stockfishchess.org/tests/view/601c21557f517a561bc49227
closes https://github.com/official-stockfish/Stockfish/pull/3337
Bench: 4154473
2021-02-08 21:39:30 +01:00
FauziAkram and Joost VandeVondele
ee3f7b6b6e
Bad Outpost Pawn Scale
...
Changed name from Bad Outpost to Uncontested Outpost
Scale Uncontested Outpost with number of pawns + Decrease Bishop PSQT values and general tuning
Credits for the decrease of the Bishop PSQT values: Fauzi
Credits for scaling Uncontested Outpost with number of pawns: Lolligerhans
Credits for the tunings: Fauzi
Passed STC:
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 32040 W: 6593 L: 6281 D: 19166
Ptnml(0-2): 596, 3713, 7095, 4015, 601
https://tests.stockfishchess.org/tests/view/5ffa43026019e097de3ef0f2
Passed LTC:
LLR: 2.95 (-2.94,2.94) {0.25,1.25}
Total: 84376 W: 11395 L: 10950 D: 62031
Ptnml(0-2): 652, 7930, 24623, 8287, 696
https://tests.stockfishchess.org/tests/view/5ffa6e7b6019e097de3ef0fd
closes https://github.com/official-stockfish/Stockfish/pull/3296
Bench: 4287509
2021-01-11 19:42:31 +01:00
FauziAkram and Joost VandeVondele
d21e421ad7
WeakUnopposed penalty for backwards on file A or H
...
Do not give the WeakUnopposed penalty for backwards on file A or H
The original idea comes from Lolligerhans, and a series of tunings and tests done by Fauzi.
Passed STC:
LLR: 2.96 (-2.94,2.94) {-0.25,1.25}
Total: 140864 W: 28127 L: 27660 D: 85077
Ptnml(0-2): 2529, 16660, 31735, 16831, 2677
https://tests.stockfishchess.org/tests/view/5fe39dec3932f79192d39673
Passed LTC:
LLR: 2.95 (-2.94,2.94) {0.25,1.25}
Total: 67568 W: 8993 L: 8590 D: 49985
Ptnml(0-2): 523, 6176, 19983, 6579, 523
https://tests.stockfishchess.org/tests/view/5fe3dd1b3932f79192d39693
closes https://github.com/official-stockfish/Stockfish/pull/3275
Bench: 4109336
2020-12-31 18:03:33 +01:00
FauziAkram and Joost VandeVondele
45b05328b6
Tweak the formulas for unsafeSquares
...
We give more bonus for a special case: If there are some enemy squares occupied
or attacked by the enemy on the passed pawn span,
but if they are all attacked by our pawn, use new intermediate factor 30.
The main credit goes to Rocky for the idea, with additional tuning and tests.
Passed STC:
LLR: 2.95 (-2.94,2.94) {-0.25,1.25}
Total: 96464 W: 19233 L: 18834 D: 58397
Ptnml(0-2): 1683, 11327, 21950, 11452, 1820
https://tests.stockfishchess.org/tests/view/5fdd21ab3932f79192d39357
Passed LTC:
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 81320 W: 10784 L: 10352 D: 60184
Ptnml(0-2): 602, 7524, 24044, 7820, 670
https://tests.stockfishchess.org/tests/view/5fddec983932f79192d393a4
closes https://github.com/official-stockfish/Stockfish/pull/3268
Bench: 4338972
2020-12-23 20:17:57 +01:00
FauziAkram and Joost VandeVondele
66a7a8a0cc
Adjust definition of unsafeSquares
...
and adjust related bonus values. The bonus is now not given whenever
there is an enemy piece in front of the pawn.
Passed STC:
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 109472 W: 22097 L: 21673 D: 65702
Ptnml(0-2): 2111, 12800, 24482, 13240, 2103
https://tests.stockfishchess.org/tests/view/5fd8d3740c5870924361ffad
Passed LTC:
LLR: 2.95 (-2.94,2.94) {0.25,1.25}
Total: 39384 W: 5334 L: 4990 D: 29060
Ptnml(0-2): 279, 3648, 11535, 3910, 320
https://tests.stockfishchess.org/tests/view/5fd971ab0c5870924361fff0
closes https://github.com/official-stockfish/Stockfish/pull/3266
Bench: 4488955
2020-12-18 21:17:34 +01:00
FauziAkram and Joost VandeVondele
d706ae62d7
New Imbalance Tables Tweak
...
Imbalance tables tweaked to contain MiddleGame and Endgame values, instead of a single value.
The idea started from Fisherman, which requested my help to tune the values back in June/July,
so I tuned the values back then, and we were able to accomplish good results,
but not enough to pass both STC and LTC tests.
So after the recent changes, I decided to give it another shot, and I am glad that it was a successful attempt.
A special thanks goes also to mstembera, which notified me a simple way to let the patch perform a little better.
Passed STC:
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 115976 W: 23124 L: 22695 D: 70157
Ptnml(0-2): 2074, 13652, 26285, 13725, 2252
https://tests.stockfishchess.org/tests/view/5fc92d2d42a050a89f02ccc8
Passed LTC:
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 156304 W: 20617 L: 20024 D: 115663
Ptnml(0-2): 1138, 14647, 46084, 15050, 1233
https://tests.stockfishchess.org/tests/view/5fc9fee142a050a89f02cd3e
closes https://github.com/official-stockfish/Stockfish/pull/3255
Bench: 4278746
2020-12-12 09:31:28 +01:00
FauziAkram and Joost VandeVondele
f9595828eb
Rook Mobility Tweak
...
Passed STC:
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 171152 W: 34715 L: 34202 D: 102235
Ptnml(0-2): 3278, 20155, 38228, 20606, 3309
https://tests.stockfishchess.org/tests/view/5fa861f467cbf42301d6a68e
Passed LTC:
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 149616 W: 20471 L: 19882 D: 109263
Ptnml(0-2): 1172, 14434, 43102, 14833, 1267
https://tests.stockfishchess.org/tests/view/5fa9c8ff67cbf42301d6a74f
closes https://github.com/official-stockfish/Stockfish/pull/3226
Bench: 3597730
2020-11-15 13:23:19 +01:00
FauziAkram and Joost VandeVondele
7fc47eeb6f
Introducing King On File
...
this new concept calculates bonuses/penalties for the king when the king is in a semiopen or open file.
Passed STC:
LLR: 2.95 (-2.94,2.94) {-0.25,1.25}
Total: 44904 W: 9365 L: 9028 D: 26511
Ptnml(0-2): 857, 5309, 9841, 5530, 915
https://tests.stockfishchess.org/tests/view/5fa343625d72639a7acef72b
Passed LTC:
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 60552 W: 8449 L: 8051 D: 44052
Ptnml(0-2): 466, 5772, 17481, 6012, 545
https://tests.stockfishchess.org/tests/view/5fa40e365d72639a7acef79e
closes https://github.com/official-stockfish/Stockfish/pull/3219
Bench: 3689484
2020-11-07 16:49:49 +01:00
FauziAkram and Joost VandeVondele
931070b65a
Elo Worth in King Danger
...
Adding the EloWorth for each term in King Danger.
Should be useful for simplifications, tuning patches, and new ideas.
closes https://github.com/official-stockfish/Stockfish/pull/3204
non-functional change
2020-11-02 19:41:17 +01:00
FauziAkram and Joost VandeVondele
bde3505758
Bishop Pawns based on Files
...
Passed STC:
https://tests.stockfishchess.org/tests/view/5f8cc8145a4eacb45305da3c
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 132544 W: 27795 L: 27328 D: 77421
Ptnml(0-2): 2756, 15558, 29272, 15835, 2851
Passed LTC:
https://tests.stockfishchess.org/tests/view/5f8df614bacb75a4f9a4721e
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 169608 W: 23257 L: 22622 D: 123729
Ptnml(0-2): 1408, 16316, 48758, 16877, 1445
closes https://github.com/official-stockfish/Stockfish/pull/3194
Bench: 4067106
2020-10-28 08:11:29 +01:00
FauziAkram and Joost VandeVondele
4a5cc1365f
RookOnQueenFile Removal
...
Removing Rook On Queen File looks beneficial, and it might even bring some ELO.
I will try to reintroduce it with a different method later on.
Passed STC:
https://tests.stockfishchess.org/tests/view/5f7cea204389873867eb10cb
LLR: 2.94 (-2.94,2.94) {-1.25,0.25}
Total: 18624 W: 3800 L: 3568 D: 11256
Ptnml(0-2): 308, 2131, 4257, 2253, 363
Passed LTC:
https://tests.stockfishchess.org/tests/view/5f7d76a4e936c6892bf50598
LLR: 2.95 (-2.94,2.94) {-0.75,0.25}
Total: 117864 W: 15515 L: 15340 D: 87009
Ptnml(0-2): 926, 11127, 34671, 11262, 946
closes https://github.com/official-stockfish/Stockfish/pull/3176
Bench: 3756191
2020-10-14 19:29:22 +02:00
FauziAkram and Joost VandeVondele
767b4f4fbe
Pawn Tuning
...
Tuning of pawns, for classical evaluation:
Passed STC:
https://tests.stockfishchess.org/tests/view/5f771f0e52560f5fc78559ec
LLR: 2.96 (-2.94,2.94) {-0.25,1.25}
Total: 252696 W: 50321 L: 49692 D: 152683
Ptnml(0-2): 4614, 29845, 57049, 29978, 4862
Passed LTC:
https://tests.stockfishchess.org/tests/view/5f77cfef090dcf9aaa16d38b
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 48184 W: 6556 L: 6193 D: 35435
Ptnml(0-2): 335, 4516, 14100, 4733, 408
closes https://github.com/official-stockfish/Stockfish/pull/3169
bench: 4016121
2020-10-05 19:01:46 +02:00
