Viren6 and Disservin
ec7f1d6229
Increment cutoffCnt less often after fail high
...
Only increment when extension is less than 2 or it's a PvNode.
Tested vs #5851 .
Failed STC:
LLR: -2.97 (-2.94,2.94) <0.00,2.00>
Total: 360064 W: 94546 L: 94271 D: 171247
Ptnml(0-2): 1835, 42826, 90314, 43343, 1714
https://tests.stockfishchess.org/tests/view/679f79cc0774dfd78deb1112
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 443076 W: 113942 L: 113081 D: 216053
Ptnml(0-2): 480, 49076, 121579, 49909, 494
https://tests.stockfishchess.org/tests/view/679fa21b0774dfd78deb1178
Passed VLTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 187184 W: 48098 L: 47495 D: 91591
Ptnml(0-2): 59, 19036, 54792, 19653, 52
https://tests.stockfishchess.org/tests/view/679fb6000774dfd78deb11e8
closes https://github.com/official-stockfish/Stockfish/pull/5855
Bench: 3018089
2025-02-04 21:30:54 +01:00
Viren6 and Joost VandeVondele
435ba3dbb5
Revert "Moving up the if position is or has been on the PV reduction"
...
Passed VVLTC 1:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 68362 W: 17830 L: 17523 D: 33009
Ptnml(0-2): 9, 6253, 21347, 6566, 6
https://tests.stockfishchess.org/tests/view/6790271cfc8c306ba6cea2c1
Passed VVLTC 2:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 113256 W: 29158 L: 28721 D: 55377
Ptnml(0-2): 13, 10521, 35122, 10960, 12
https://tests.stockfishchess.org/tests/view/678d3e47d63764e34db491a3
closes https://github.com/official-stockfish/Stockfish/pull/5815
bench 1943998
2025-01-25 20:51:31 +01:00
Viren6 and Disservin
e2612f9a29
Introduce Correction History Quad Extensions
...
Also modifies the double and triple extension margins with the correction history adjustment.
STC Elo Estimate:
Elo: -4.40 ± 1.4 (95%) LOS: 0.0%
Total: 60000 W: 15230 L: 15990 D: 28780
Ptnml(0-2): 264, 7495, 15168, 6883, 190
nElo: -8.48 ± 2.8 (95%) PairsRatio: 0.91
https://tests.stockfishchess.org/tests/view/6783a3786ddf09c0b4b703a1
Passed 1st VVLTC:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 35736 W: 9354 L: 9088 D: 17294
Ptnml(0-2): 4, 3191, 11212, 3457, 4
https://tests.stockfishchess.org/tests/view/6783a3336ddf09c0b4b7039b
Passed 2nd VVLTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 36394 W: 9515 L: 9225 D: 17654
Ptnml(0-2): 1, 3271, 11364, 3559, 2
https://tests.stockfishchess.org/tests/view/678395e26ddf09c0b4b70345
closes https://github.com/official-stockfish/Stockfish/pull/5767
Bench: 1567166
2025-01-12 21:36:39 +01:00
Viren6 and Joost VandeVondele
36eb9bc783
Use futility margin in razoring margin
...
Uses futilityMargin * depth to set the razoring margin. This retains the
quadratic depth scaling to preserve mate finding capabilities. This patch is
nice because it increases the elo sensitivity of the futility margin
heuristics.
Passed STC:
https://tests.stockfishchess.org/tests/view/665f9892fd11ae7170b4849c
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 39392 W: 10348 L: 10030 D: 19014
Ptnml(0-2): 99, 4585, 10009, 4905, 98
Passed LTC:
https://tests.stockfishchess.org/tests/view/665f9d2dfd11ae7170b484a8
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 107910 W: 27521 L: 27053 D: 53336
Ptnml(0-2): 73, 11835, 29670, 12305, 72
closes https://github.com/official-stockfish/Stockfish/pull/5360
bench 1277173
2024-06-05 21:33:46 +02:00
Viren6 and Joost VandeVondele
a77a895c3b
Add extension condition to cutoffCnt
...
Decrease cutoffCnt increment by 1 if extension is 2 or greater.
Passed STC:
https://tests.stockfishchess.org/tests/view/66577a696b0e318cefa8d34d
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 99200 W: 25703 L: 25297 D: 48200
Ptnml(0-2): 253, 11660, 25390, 12022, 275
Passed LTC:
https://tests.stockfishchess.org/tests/view/665787ab6b0e318cefa8d411
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 124530 W: 31659 L: 31161 D: 61710
Ptnml(0-2): 58, 13578, 34489, 14088, 52
closes https://github.com/official-stockfish/Stockfish/pull/5310
bench 1623228
2024-05-30 14:34:24 +02:00
Viren6 and Disservin
6db47ed71a
Addition of new scaling comments
...
This patch is intended to prevent patches like 9b90cd8e3c9ed7https://tests.stockfishchess.org/tests/view/6647b19f6dcff0d1d6b05d52
Elo: 4.28 ± 0.8 (95%) LOS: 100.0%
Total: 200000 W: 52555 L: 50094 D: 97351
Ptnml(0-2): 573, 22628, 51248, 24867, 684
nElo: 8.35 ± 1.5 (95%) PairsRatio: 1.10
VLTC: https://tests.stockfishchess.org/tests/view/6647b1b06dcff0d1d6b05d54
Elo: -1.48 ± 1.0 (95%) LOS: 0.2%
Total: 100000 W: 25009 L: 25436 D: 49555
Ptnml(0-2): 11, 10716, 28971, 10293, 9
nElo: -3.23 ± 2.2 (95%) PairsRatio: 0.96
The else if condition is moved to the non scaling section based on:
https://tests.stockfishchess.org/tests/view/664567a193ce6da3e93b3232 (It
has no proven scaling)
General comment improvements and removal of a redundant margin condition
have also been included.
closes https://github.com/official-stockfish/Stockfish/pull/5266
No functional change
2024-05-23 21:29:36 +02:00
2d32581623
Revert "Simplify Away Quadruple Extensions"
...
This reverts commit 4edd1a3https://github.com/official-stockfish/Stockfish/pull/5265
bench 1404295
Co-Authored-By: Michael Chaly <26898827+Vizvezdenec@users.noreply.github.com >
2024-05-19 09:37:22 +02:00
Viren6 and Joost VandeVondele
741aaf8a38
Introduce Quadruple Extensions
...
This patch introduces quadruple extensions, with the new condition of not ttPv. It also generalises all margins, so that extensions can still occur if conditions are only partially fulfilled, but with a stricter margin.
Failed STC:
LLR: -2.94 (-2.94,2.94) <0.00,2.00>
Total: 16096 W: 3984 L: 4228 D: 7884
Ptnml(0-2): 72, 2067, 4002, 1847, 60
https://tests.stockfishchess.org/tests/view/66316422d01fb9ac9bcdbdcd
Passed VVLTC 1:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 96660 W: 24550 L: 24210 D: 47900
Ptnml(0-2): 5, 8776, 30426, 9120, 3
https://tests.stockfishchess.org/tests/view/66361f2c74fa3f41ef2ee091
Passed VVLTC 2:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 80546 W: 20495 L: 20120 D: 39931
Ptnml(0-2): 6, 7477, 24929, 7858, 3
https://tests.stockfishchess.org/tests/view/66350cf739ba8e443112b3fa
closes https://github.com/official-stockfish/Stockfish/pull/5211
bench 2233743
2024-05-05 12:53:58 +02:00
0716b845fd
Update NNUE architecture to SFNNv9 and net nn-ae6a388e4a1a.nnue
...
Part 1: PyTorch Training, linrock
Trained with a 10-stage sequence from scratch, starting in May 2023:
https://github.com/linrock/nnue-tools/blob/master/exp-sequences/3072-10stage-SFNNv9.yml
While the training methods were similar to the L1-2560 training sequence,
the last two stages introduced min-v2 binpacks,
where bestmove capture and in-check position scores were not zeroed during minimization,
for compatibility with skipping SEE >= 0 positions and future research.
Training data can be found at:
https://robotmoon.com/nnue-training-data
This net was tested at epoch 679 of the 10th training stage:
https://tests.stockfishchess.org/tests/view/65f32e460ec64f0526c48dbc
Part 2: SPSA Training, Viren6
The net was then SPSA tuned.
This consisted of the output weights (32 * 8) and biases (8)
as well as the L3 biases (32 * 8) and L2 biases (16 * 8), totalling 648 params in total.
The SPSA tune can be found here:
https://tests.stockfishchess.org/tests/view/65fc33ba0ec64f0526c512e3
With the help of Disservin , the initial weights were extracted with:
https://github.com/Viren6/Stockfish/tree/new228
The net was saved with the tuned weights using:
https://github.com/Viren6/Stockfish/tree/new241
Earlier nets of the SPSA failed STC compared to the base 3072 net of part 1:
https://tests.stockfishchess.org/tests/view/65ff356e0ec64f0526c53c98
Therefore it is suspected that the SPSA at VVLTC has
added extra scaling on top of the scaling of increasing the L1 size.
Passed VVLTC 1:
https://tests.stockfishchess.org/tests/view/6604a9020ec64f0526c583da
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 53042 W: 13554 L: 13256 D: 26232
Ptnml(0-2): 12, 5147, 15903, 5449, 10
Passed VVLTC 2:
https://tests.stockfishchess.org/tests/view/660ad1b60ec64f0526c5dd23
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 17506 W: 4574 L: 4315 D: 8617
Ptnml(0-2): 1, 1567, 5362, 1818, 5
STC Elo estimate:
https://tests.stockfishchess.org/tests/view/660b834d01aaec5069f87cb0
Elo: -7.66 ± 3.8 (95%) LOS: 0.0%
Total: 9618 W: 2440 L: 2652 D: 4526
Ptnml(0-2): 80, 1281, 2261, 1145, 42
nElo: -13.94 ± 6.9 (95%) PairsRatio: 0.87
closes https://tests.stockfishchess.org/tests/view/660b834d01aaec5069f87cb0
bench 1823302
Co-Authored-By: Linmiao Xu <lin@robotmoon.com >
2024-04-02 08:49:48 +02:00
Viren6 and Joost VandeVondele
f2b6b5cfc9
Introduce Triple Extensions
...
This replaces singularquietLMR with triple instead of double extending non-capture ttmoves that have value far below singularBeta. This threshold value is initially set to 200, there is scope for more scaling by reducing it as occured with double extensions.
Passed STC:
https://tests.stockfishchess.org/tests/view/65b683b8c865510db0274074
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 222912 W: 58141 L: 57535 D: 107236
Ptnml(0-2): 1063, 26244, 56154, 27014, 981
Passed LTC:
https://tests.stockfishchess.org/tests/view/65bae6d4c865510db0278eb5
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 66306 W: 16825 L: 16440 D: 33041
Ptnml(0-2): 40, 7374, 17952, 7735, 52
closes https://github.com/official-stockfish/Stockfish/pull/5027
bench 1394701
2024-02-03 17:26:42 +01:00
Viren6 and Disservin
fcbb02ffde
Use ttPv in depth condition of singular extensions
...
This replaces the PvNode condition and tte Pv call previously with using
the precomputed ttPv, and also removes the multiplier of 2. This new
depth condition occurs with approximately equal frequency (47%) to the
old depth condition (measured when the other conditions in the if are
true), so non-linear scaling behaviour isn't expected.
Passed Non-Reg STC:
https://tests.stockfishchess.org/tests/view/65b0e132c865510db026da27
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 243232 W: 62432 L: 62437 D: 118363
Ptnml(0-2): 910, 28937, 61900, 28986, 883
Passed Non-Reg LTC:
https://tests.stockfishchess.org/tests/view/65b2053bc865510db026eea1
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 190596 W: 47666 L: 47618 D: 95312
Ptnml(0-2): 115, 21710, 51596, 21766, 111
closes https://github.com/official-stockfish/Stockfish/pull/5015
Bench: 1492957
2024-01-26 21:15:07 +01:00
Viren6 and Disservin
aa15a9179b
Refactor ttPv reduction conditions
...
closes https://github.com/official-stockfish/Stockfish/pull/4999
No functional change
2024-01-21 12:33:08 +01:00
Viren6 and Disservin
c8bc2ce4fa
Improve ttPv reduction
...
This patch allows a partial reduction decrease when a node is likely to
fail low, and increases the reduction decrease when a node has failed
high.
Passed STC:
https://tests.stockfishchess.org/tests/view/65a626e779aa8af82b9722bc
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 157824 W: 40332 L: 39835 D: 77657
Ptnml(0-2): 543, 18617, 40098, 19108, 546
Passed LTC:
https://tests.stockfishchess.org/tests/view/65a7290279aa8af82b97328a
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 57228 W: 14475 L: 14111 D: 28642
Ptnml(0-2): 34, 6278, 15633, 6628, 41
closes https://github.com/official-stockfish/Stockfish/pull/4994
Bench: 1364759
2024-01-17 18:56:37 +01:00
Viren6 and Disservin
28f8663f39
Modify ttPV reduction
...
This patch modifies ttPV reduction by reducing 1 more unless ttValue is above alpha.
Inspired from @pb00068 https://tests.stockfishchess.org/tests/view/658060796a3b4f6202215f1f
Passed STC:
https://tests.stockfishchess.org/tests/view/6591867679aa8af82b958328
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 37856 W: 9727 L: 9407 D: 18722
Ptnml(0-2): 99, 4444, 9568, 4672, 145
Passed LTC:
https://tests.stockfishchess.org/tests/view/6591d9b679aa8af82b958a6c
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 128256 W: 32152 L: 31639 D: 64465
Ptnml(0-2): 64, 14364, 34772, 14851, 77
closes https://github.com/official-stockfish/Stockfish/pull/4957
Bench: 1176235
2024-01-04 15:49:33 +01:00
Viren6 and Joost VandeVondele
887bbd8b3d
Remove setting of static to none if in check in qsearch
...
Small simplification
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/6487924d713491385c8034ae
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 59616 W: 15885 L: 15703 D: 28028
Ptnml(0-2): 144, 6130, 17086, 6296, 152
closes https://github.com/official-stockfish/Stockfish/pull/4618
No functional change.
2023-06-14 18:33:56 +02:00
