FauziAkram and Disservin
e5aa4b48c6
Simplify Evasion Move Scoring
...
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 160256 W: 41432 L: 41348 D: 77476
Ptnml(0-2): 485, 19034, 41028, 19074, 507
https://tests.stockfishchess.org/tests/view/680d242c3629b02d74b15662
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 103086 W: 26388 L: 26252 D: 50446
Ptnml(0-2): 41, 11174, 28982, 11300, 46
https://tests.stockfishchess.org/tests/view/680d47f83629b02d74b1571e
closes https://github.com/official-stockfish/Stockfish/pull/6029
Bench: 1937261
2025-04-27 19:47:08 +02:00
FauziAkram and Disservin
f98c178960
Improve quiet moves bonus
...
Inspired by an old test by Peregrine.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 453024 W: 117244 L: 116316 D: 219464
Ptnml(0-2): 1336, 53355, 116258, 54171, 1392
https://tests.stockfishchess.org/tests/view/680ccacc3629b02d74b15532
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 140550 W: 35990 L: 35462 D: 69098
Ptnml(0-2): 65, 15152, 39319, 15668, 71
https://tests.stockfishchess.org/tests/view/680d2ed73629b02d74b15691
closes https://github.com/official-stockfish/Stockfish/pull/6028
Bench: 1708152
2025-04-27 19:45:37 +02:00
FauziAkram and Joost VandeVondele
5f32b3ed4b
Remove unneeded return statement
...
closes https://github.com/official-stockfish/Stockfish/pull/6013
No functional change
2025-04-26 22:26:39 +02:00
FauziAkram and Joost VandeVondele
8b85290313
Remove manual stack alignment workaround for GCC < 9.3
...
consequently using these old compilers will now error out.
closes https://github.com/official-stockfish/Stockfish/pull/6008
No functional change.
2025-04-26 22:15:08 +02:00
FauziAkram and Joost VandeVondele
f6b0d53a99
Re-adding the 5th continuation history
...
the two simplifications (#5992 and #5978 ) are strongly correlated.
Passed STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 98016 W: 25415 L: 25008 D: 47593
Ptnml(0-2): 291, 11509, 25005, 11908, 295
https://tests.stockfishchess.org/tests/view/6802774fcd501869c6698168
Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 588588 W: 150073 L: 148633 D: 289882
Ptnml(0-2): 281, 63615, 165078, 65023, 297
https://tests.stockfishchess.org/tests/view/6804cbdacd501869c66987dc
closes https://github.com/official-stockfish/Stockfish/pull/6002
Bench: 1783315
2025-04-26 21:58:46 +02:00
FauziAkram and Disservin
44efbaddea
Simplify bonusScale calculation
...
Allowing this specific term to potentially become negative for low depth
values is ok, because the overall `bonusScale` is explicitly ensured to
be non-negative a few lines later: bonusScale = std::max(bonusScale, 0);
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 164928 W: 42446 L: 42368 D: 80114
Ptnml(0-2): 497, 19551, 42306, 19597, 513
https://tests.stockfishchess.org/tests/view/67debf0b8888403457d8736c
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 234942 W: 59539 L: 59537 D: 115866
Ptnml(0-2): 113, 25639, 65964, 25643, 112
https://tests.stockfishchess.org/tests/view/67e2e1c48888403457d87768
closes https://github.com/official-stockfish/Stockfish/pull/5979
Bench: 1933843
2025-04-18 14:32:26 +02:00
FauziAkram and Disservin
5f8e67a544
Remove combineLast3 optimization
...
Passed non-reg STC 1st:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 67328 W: 17296 L: 17118 D: 32914
Ptnml(0-2): 158, 7095, 19011, 7211, 189
https://tests.stockfishchess.org/tests/view/67e6c2796682f97da2178ebe
Passed non-reg STC 2nd:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 92288 W: 23885 L: 23734 D: 44669
Ptnml(0-2): 213, 10039, 25518, 10132, 242
https://tests.stockfishchess.org/tests/view/67ed6a2d31d7cf8afdc45190
closes https://github.com/official-stockfish/Stockfish/pull/5975
Bench: 1875196
2025-04-18 14:32:26 +02:00
FauziAkram and Disservin
cf8b3637a0
Improve futility pruning
...
Adding a small term to the futility calculation that depends on eval - beta.
Refactored to a simpler form.
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 74176 W: 19323 L: 18954 D: 35899
Ptnml(0-2): 226, 8576, 19117, 8941, 228
https://tests.stockfishchess.org/tests/view/67e6b0946682f97da2178eaf
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 135090 W: 34499 L: 33983 D: 66608
Ptnml(0-2): 79, 14403, 38040, 14969, 54
https://tests.stockfishchess.org/tests/view/67e757cc6682f97da2178f62
closes https://github.com/official-stockfish/Stockfish/pull/5970
Bench: 1875196
2025-04-18 14:32:19 +02:00
FauziAkram and Disservin
dfef7e7520
Remove redundant assignment
...
closes https://github.com/official-stockfish/Stockfish/pull/5944
No functional change
2025-04-02 17:36:46 +02:00
FauziAkram and Disservin
0dabf4f3fa
Removing the conditional bonus calculation
...
The new value is just a guessed value.
Passed STC:
https://tests.stockfishchess.org/tests/view/67d5ee09517865b4a2dfd2df
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 52128 W: 13516 L: 13312 D: 25300
Ptnml(0-2): 157, 6044, 13451, 6262, 150
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 42384 W: 10855 L: 10657 D: 20872
Ptnml(0-2): 19, 4554, 11852, 4744, 23
https://tests.stockfishchess.org/tests/view/67d5f9d3517865b4a2dfd2ef
closes https://github.com/official-stockfish/Stockfish/pull/5933
Bench: 2030154
2025-03-21 11:22:25 +01:00
FauziAkram and Disservin
4afd7f1a7b
Removing contHist[1] from pruning formula
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 51552 W: 13297 L: 13091 D: 25164
Ptnml(0-2): 166, 6009, 13215, 6225, 161
https://tests.stockfishchess.org/tests/view/67c4de79685e87e15e7c43f5
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 244554 W: 62135 L: 62142 D: 120277
Ptnml(0-2): 137, 26612, 68794, 26589, 145
https://tests.stockfishchess.org/tests/view/67c50982685e87e15e7c443d
closes https://github.com/official-stockfish/Stockfish/pull/5928
Bench: 1980385
2025-03-21 11:16:27 +01:00
FauziAkram and Disservin
5c617e579c
VVLTC Search Tune
...
Passed VVLTC with STC bounds:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 15788 W: 4106 L: 3868 D: 7814
Ptnml(0-2): 0, 1324, 5009, 1560, 1
https://tests.stockfishchess.org/tests/view/67bf2ddd6e569f6234102ade
Passed VVLTC with LTC bounds:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 13622 W: 3620 L: 3368 D: 6634
Ptnml(0-2): 3, 1190, 4170, 1448, 0
https://tests.stockfishchess.org/tests/view/67c04308c8f7c4c0632d8055
closes https://github.com/official-stockfish/Stockfish/pull/5910
Bench: 1823605
2025-02-27 20:40:56 +01:00
FauziAkram and Disservin
a730b4d08b
Remove two unnecessary divisions
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 280768 W: 72187 L: 72236 D: 136345
Ptnml(0-2): 815, 33131, 72550, 33064, 824
https://tests.stockfishchess.org/tests/view/67bcf7afe670525923b8a101
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 108684 W: 27666 L: 27536 D: 53482
Ptnml(0-2): 40, 11768, 30606, 11878, 50
https://tests.stockfishchess.org/tests/view/67be472ed8d5c2c657c52cb8
closes https://github.com/official-stockfish/Stockfish/pull/5908
Bench: 2400689
2025-02-27 20:34:49 +01:00
FauziAkram and Disservin
93b966829b
Simplify bestvalue update formula
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 124960 W: 32598 L: 32472 D: 59890
Ptnml(0-2): 480, 14852, 31694, 14970, 484
https://tests.stockfishchess.org/tests/view/67b348bae00eea114cdba37d
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 150306 W: 38220 L: 38132 D: 73954
Ptnml(0-2): 98, 16430, 42005, 16526, 94
https://tests.stockfishchess.org/tests/view/67b5e37918a66624a7a3f751
closes https://github.com/official-stockfish/Stockfish/pull/5898
Bench: 2146010
2025-02-24 19:16:26 +01:00
FauziAkram and Disservin
095d19afea
Use neon_m128_reduce_add_epi32 for NEON vector reduction
...
Accomplishing the entire horizontal addition in a single NEON instruction
closes https://github.com/official-stockfish/Stockfish/pull/5885
No functional change
2025-02-24 19:07:29 +01:00
FauziAkram and Disservin
ee7259e48b
Small code cleanup
...
Use std::is_arithmetic_v as it is the more modern and concise way to
check for arithmetic types. While at it, fixing a static assert in
misc.h, thanks to Shawn and Disservin for helping.
closes https://github.com/official-stockfish/Stockfish/pull/5883
No functional change
2025-02-24 19:04:59 +01:00
FauziAkram and Disservin
fa6c30af81
FutilityValue formula tweak
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 29600 W: 7979 L: 7662 D: 13959
Ptnml(0-2): 138, 3446, 7324, 3745, 147
https://tests.stockfishchess.org/tests/view/67ac7dff52879dfd14d7e7da
Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 49662 W: 12850 L: 12502 D: 24310
Ptnml(0-2): 41, 5354, 13689, 5710, 37
https://tests.stockfishchess.org/tests/view/67acc1b252879dfd14d7e81d
closes https://github.com/official-stockfish/Stockfish/pull/5879
Bench: 2581469
2025-02-13 20:18:35 +01:00
FauziAkram and Disservin
67573218e1
VVLTC parameters tweak
...
Some notes:
- Both tests were conducted on top of #5848 .
- Based on tuning suggestions, the extension for capturing the
previously moved piece was removed/simplified. (Developers can attempt
to reintroduce it post-merge if needed.)
- Initially, bonusScale = std::max(bonusScale, -2); was included but
later removed in the second test upon Viz's request, however, it was
nearly non-functional anyway.
Passed VVLTC under STC bounds:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 31508 W: 8153 L: 7895 D: 15460
Ptnml(0-2): 1, 2747, 10005, 2995, 6
https://tests.stockfishchess.org/tests/view/679fdc7a0774dfd78deb1350
Passed VVLTC under LTC bounds:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 55026 W: 14370 L: 14046 D: 26610
Ptnml(0-2): 7, 4957, 17262, 5279, 8
https://tests.stockfishchess.org/tests/view/679fec920774dfd78deb19b8
closes https://github.com/official-stockfish/Stockfish/pull/5856
Bench: 2757788
2025-02-04 21:34:08 +01:00
FauziAkram and Disservin
f50d52aa7f
No Ply Restriction in the condition that limits the depth extension to a certain point
...
No Ply Restriction in the condition that limits the depth extension to a
certain point.
Passed again LTC rebased:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 195108 W: 49916 L: 49872 D: 95320
Ptnml(0-2): 170, 21846, 53464, 21918, 156
https://tests.stockfishchess.org/tests/view/6795542a406a4efe9eb7d361
closes https://github.com/official-stockfish/Stockfish/pull/5824
Bench: 1767398
2025-01-26 22:53:34 +01:00
FauziAkram and Disservin
69be04d38e
Simplify cutoffCnt
...
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 235872 W: 61156 L: 61155 D: 113561
Ptnml(0-2): 843, 28269, 59658, 28376, 790
https://tests.stockfishchess.org/tests/view/6794dd3e4f7de645171fb380
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 61494 W: 15644 L: 15462 D: 30388
Ptnml(0-2): 61, 6822, 16788, 7026, 50
https://tests.stockfishchess.org/tests/view/6794f86a406a4efe9eb7d093
closes https://github.com/official-stockfish/Stockfish/pull/5821
Bench: 2168937
2025-01-26 22:39:32 +01:00
FauziAkram and Joost VandeVondele
aa894c0f93
Comments Tweak
...
* Remove from comments, hardcoded exact values for parameters that are subject to tuning.
* Remove the Elo worth, as they are now completely outdated, making them irrelevant and potentially misleading.
* Consolidated scaling-related comments into a single section for clarity. Used asterisks (*) to highlight parameters significantly affected by scaling, given their separation in the code.
closes https://github.com/official-stockfish/Stockfish/pull/5810
No functional change
2025-01-25 20:29:40 +01:00
FauziAkram and Joost VandeVondele
c94bcf62e4
Moving up the if position is or has been on the PV reduction
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 29664 W: 7880 L: 7570 D: 14214
Ptnml(0-2): 93, 3487, 7390, 3741, 121
https://tests.stockfishchess.org/tests/view/678ac957c00c743bc9e9fc3f
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 81354 W: 20903 L: 20487 D: 39964
Ptnml(0-2): 66, 9003, 22123, 9419, 66
https://tests.stockfishchess.org/tests/view/678ad359c00c743bc9e9fcfa
closes https://github.com/official-stockfish/Stockfish/pull/5794
Bench: 1414638
2025-01-18 21:18:48 +01:00
FauziAkram and Joost VandeVondele
165ace194f
Remove the cap from maxscale for x moves in y seconds TC
...
Passed STC 40/10:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 48800 W: 13044 L: 12835 D: 22921
Ptnml(0-2): 229, 5457, 12863, 5578, 273
https://tests.stockfishchess.org/tests/view/67862dae460e2910c51de7c9
Passed LTC 40/40:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 141296 W: 36110 L: 36014 D: 69172
Ptnml(0-2): 222, 14350, 41440, 14382, 254
https://tests.stockfishchess.org/tests/view/678799903b8f206a2696b6f8
Passed STC 80/8:
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 155120 W: 41442 L: 41346 D: 72332
Ptnml(0-2): 953, 17232, 41102, 17312, 961
https://tests.stockfishchess.org/tests/view/678aca4dc00c743bc9e9fc47
Passed LTC 80/60:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 93950 W: 24042 L: 23904 D: 46004
Ptnml(0-2): 80, 9020, 28627, 9178, 70
https://tests.stockfishchess.org/tests/view/678af705c00c743bc9e9fe94
closes https://github.com/official-stockfish/Stockfish/pull/5790
No functional change
2025-01-18 20:58:41 +01:00
FauziAkram and Joost VandeVondele
69ec5dcbfc
Remove the type of moved piece from the evasion capture movepick formula
...
In the move generation the moves are generated in the order pawns, knight, bishops, rooks, queens and king.
This follows increasing type_of(pos.moved_piece(m)) term, so in master a capturing was sorted after a capturing rook if the same piece was captured in evasion.
Because we use a stable sorting method (stable means the order of elements with the same value are not changed) and generate the moves in the above order we do'nt need the removed term.
Passed STC:
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 170560 W: 44222 L: 44148 D: 82190
Ptnml(0-2): 569, 18792, 46488, 18858, 573
https://tests.stockfishchess.org/tests/view/678530ee460e2910c51de21d
closes https://github.com/official-stockfish/Stockfish/pull/5784
No functional change
2025-01-18 20:44:04 +01:00
FauziAkram and Disservin
c085670b84
Increase the depth margin
...
Tested at VVLTC against the passed patches.
Test 1 against PR5764
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 167260 W: 43053 L: 42521 D: 81686
Ptnml(0-2): 7, 15272, 52542, 15800, 9
https://tests.stockfishchess.org/tests/view/6782ef196ddf09c0b4b6e780
Test 2 against PR5765
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 300012 W: 77364 L: 76771 D: 145877
Ptnml(0-2): 22, 27555, 94256, 28154, 19
https://tests.stockfishchess.org/tests/view/678366446ddf09c0b4b7028c
closes https://github.com/official-stockfish/Stockfish/pull/5768
Bench: 1379150
2025-01-12 21:36:39 +01:00
FauziAkram and Disservin
a04b07265f
Make reductionScale smoother
...
Making the second part of the formula smoother, changing it to a linear
function, increasing steadily as reductionScale increases and at the
same time, it should be a little bit simpler, therefore the
simplification bounds.
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 83040 W: 21493 L: 21322 D: 40225
Ptnml(0-2): 252, 9848, 21209, 9899, 312
https://tests.stockfishchess.org/tests/view/6762145486d5ee47d9543242
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 230124 W: 58485 L: 58478 D: 113161
Ptnml(0-2): 175, 25620, 63484, 25589, 194
https://tests.stockfishchess.org/tests/view/6762d4ef86d5ee47d9543367
closes https://github.com/official-stockfish/Stockfish/pull/5725
Bench: 1204658
2024-12-22 15:24:09 +01:00
FauziAkram and Disservin
d5a36a3c92
Simplify probCutBeta formula
...
After recent changes to the improving definition, seems like there is no
need anymore to keep opponentWorsening in the probCutBeta formula.
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 214272 W: 55566 L: 55541 D: 103165
Ptnml(0-2): 620, 25540, 54817, 25513, 646
https://tests.stockfishchess.org/tests/view/6735243d86d5ee47d953eaea
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 126708 W: 32329 L: 32216 D: 62163
Ptnml(0-2): 68, 13986, 35123, 14119, 58
https://tests.stockfishchess.org/tests/view/67393cf686d5ee47d953ef99
closes https://github.com/official-stockfish/Stockfish/pull/5697
Bench: 983067
2024-12-08 19:49:01 +01:00
FauziAkram and Disservin
0282edc0b0
Simplify bonus formula
...
Give full bonus instead of half.
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 23872 W: 6254 L: 6018 D: 11600
Ptnml(0-2): 80, 2691, 6152, 2939, 74
https://tests.stockfishchess.org/tests/view/673b709686d5ee47d953f19d
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 42894 W: 10924 L: 10725 D: 21245
Ptnml(0-2): 30, 4592, 12011, 4777, 37
https://tests.stockfishchess.org/tests/view/673bb50386d5ee47d953f1eb
closes https://github.com/official-stockfish/Stockfish/pull/5683
Bench: 836558
2024-11-22 23:23:42 +01:00
FauziAkram and Disservin
ce2d9e27ea
Simplify big-net reevaluation
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 37408 W: 9699 L: 9477 D: 18232
Ptnml(0-2): 130, 4326, 9577, 4534, 137
https://tests.stockfishchess.org/tests/view/672ffd8086d5ee47d953e633
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 151062 W: 38087 L: 37999 D: 74976
Ptnml(0-2): 63, 16686, 41958, 16748, 76
https://tests.stockfishchess.org/tests/view/673087aa86d5ee47d953e66b
closes https://github.com/official-stockfish/Stockfish/pull/5674
Bench: 848812
2024-11-13 20:35:02 +01:00
FauziAkram and Disservin
54cf226604
Revert VLTC regression from #5634
...
https://tests.stockfishchess.org/tests/view/671bf61b86d5ee47d953cf23
And thanks to @xu-shawn for suggesting running a VLTC regress test since
depth modifications affect scaling. Also, the LTC was showing a slight
regress after 680+k games ~= -0.34 , for reference:
https://tests.stockfishchess.org/tests/view/67042b1f86d5ee47d953be7c
closes https://github.com/official-stockfish/Stockfish/pull/5663
Bench: 1307308
2024-11-13 20:09:13 +01:00
FauziAkram and Disservin
8681d3c2b3
Simplify Time Management Formula
...
Decreasing the number of operations
Passed STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 38880 W: 10038 L: 9823 D: 19019
Ptnml(0-2): 92, 4334, 10395, 4505, 114
https://tests.stockfishchess.org/tests/view/67112bf586d5ee47d953c6be
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 242844 W: 61425 L: 61431 D: 119988
Ptnml(0-2): 145, 25175, 70797, 25151, 154
https://tests.stockfishchess.org/tests/view/6712387486d5ee47d953c737
closes https://github.com/official-stockfish/Stockfish/pull/5655
Bench: 1281912
2024-10-31 10:07:24 +01:00
FauziAkram and Disservin
2ce47573b4
Remove -stat_malus(newDepth)
...
Passed STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 92544 W: 23940 L: 23778 D: 44826
Ptnml(0-2): 286, 10936, 23638, 11154, 258
https://tests.stockfishchess.org/tests/view/670c3d6986d5ee47d953c30b
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 43164 W: 10986 L: 10786 D: 21392
Ptnml(0-2): 27, 4713, 11905, 4907, 30
https://tests.stockfishchess.org/tests/view/670eda3d86d5ee47d953c51d
closes https://github.com/official-stockfish/Stockfish/pull/5639
Bench: 1281912
2024-10-31 09:25:59 +01:00
FauziAkram and Disservin
b325b2c348
Simplify bestValue formula
...
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 45888 W: 12051 L: 11841 D: 21996
Ptnml(0-2): 123, 5356, 11807, 5504, 154
https://tests.stockfishchess.org/tests/view/670bb89086d5ee47d953c2d8
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 51336 W: 13021 L: 12830 D: 25485
Ptnml(0-2): 34, 5594, 14227, 5773, 40
https://tests.stockfishchess.org/tests/view/670c587f86d5ee47d953c31b
closes https://github.com/official-stockfish/Stockfish/pull/5637
Bench: 1192999
2024-10-31 09:25:59 +01:00
FauziAkram and Disservin
7f386d109e
Remove material corrHist
...
Passed STC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 80832 W: 21150 L: 20975 D: 38707
Ptnml(0-2): 283, 9531, 20598, 9736, 268
https://tests.stockfishchess.org/tests/view/670302fe86d5ee47d953bd68
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 46008 W: 11621 L: 11423 D: 22964
Ptnml(0-2): 30, 5072, 12606, 5262, 34
https://tests.stockfishchess.org/tests/view/6704074686d5ee47d953be53
Passed LTC Rebased:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 95814 W: 24340 L: 24195 D: 47279
Ptnml(0-2): 71, 10497, 26602, 10690, 47
https://tests.stockfishchess.org/tests/view/670ae1ac86d5ee47d953c262
closes https://github.com/official-stockfish/Stockfish/pull/5636
Bench: 1119774
2024-10-31 09:25:56 +01:00
FauziAkram and Disservin
2f3e6198e8
Simplify optimism divisor.
...
Passed STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 139360 W: 36143 L: 36033 D: 67184
Ptnml(0-2): 436, 16456, 35778, 16582, 428
https://tests.stockfishchess.org/tests/view/66fc49c786d5ee47d953b94e
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 257748 W: 65163 L: 65184 D: 127401
Ptnml(0-2): 173, 28471, 71611, 28442, 177
https://tests.stockfishchess.org/tests/view/66ff01ae86d5ee47d953bb54
Passed LTC against rebased version:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 53610 W: 13691 L: 13501 D: 26418
Ptnml(0-2): 52, 5942, 14605, 6176, 30
https://tests.stockfishchess.org/tests/view/670a9c5c86d5ee47d953c231
closes https://github.com/official-stockfish/Stockfish/pull/5633
Bench: 1282078
2024-10-31 09:12:34 +01:00
FauziAkram and Disservin
9a21e3e996
Simplify bestvalue formula
...
Passed STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 163680 W: 42689 L: 42605 D: 78386
Ptnml(0-2): 619, 19555, 41386, 19683, 597
https://tests.stockfishchess.org/tests/view/66f9451386d5ee47d953b7d9
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 96498 W: 24582 L: 24438 D: 47478
Ptnml(0-2): 62, 10642, 26718, 10744, 83
https://tests.stockfishchess.org/tests/view/66fd765786d5ee47d953ba1c
closes https://github.com/official-stockfish/Stockfish/pull/5622
Bench: 1309815
2024-10-12 16:30:44 +02:00
FauziAkram and Joost VandeVondele
5d0bb5976e
Removed ROOK threatenedByPawn
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 56608 W: 14788 L: 14588 D: 27232
Ptnml(0-2): 162, 6763, 14313, 6845, 221
https://tests.stockfishchess.org/tests/view/66e83f9c86d5ee47d953ab1d
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 175758 W: 44501 L: 44438 D: 86819
Ptnml(0-2): 125, 19489, 48601, 19526, 138
https://tests.stockfishchess.org/tests/view/66e882d486d5ee47d953ab8a
closes https://github.com/official-stockfish/Stockfish/pull/5601
bench: 1241271
2024-09-28 17:17:14 +02:00
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
