Linmiao Xu
cb4a623119
Update default smallnet to nn-37f18f62d772.nnue
...
Created by training L1-128 from scratch with:
- skipping based on simple eval in the trainer, for compatibility with
regular binpacks without requiring pre-filtering all binpacks
- minimum simple eval of 950, lower than 1000 previously
- usage of some hse-v1 binpacks with minimum simple eval 1000
- addition of hse-v6 binpacks with minimum simple eval 500
- permuting the FT with 10k positions from fishpack32.binpack
- torch.compile to speed up smallnet training
Training is significantly slower when using non-pre-filtered binpacks due to
the increased skipping required.
This net was reached at epoch 339.
```
experiment-name: 128--S1-hse-1k-T80-v6-unfilt-less-sf--se-gt950-no-wld-skip
training-dataset:
/data/:
- dfrc99-16tb7p.v2.min.binpack
/data/hse-v1/:
- leela96-filt-v2.min.high-simple-eval-1k.min-v2.binpack
- test60-novdec2021-12tb7p-filter-v6-dd.min-mar2023.unmin.high-simple-eval-1k.min-v2.binpack
- test77-nov2021-2tb7p.no-db.min.high-simple-eval-1k.min-v2.binpack
- test77-dec2021-16tb7p.no-db.min.high-simple-eval-1k.min-v2.binpack
- test77-jan2022-2tb7p.high-simple-eval-1k.min-v2.binpack
- test78-jantomay2022-16tb7p-filter-v6-dd.min-mar2023.unmin.high-simple-eval-1k.min-v2.binpack
- test78-juntosep2022-16tb7p-filter-v6-dd.min-mar2023.unmin.high-simple-eval-1k.min-v2.binpack
- test79-apr2022-16tb7p.min.high-simple-eval-1k.min-v2.binpack
- test79-may2022-16tb7p-filter-v6-dd.min-mar2023.unmin.high-simple-eval-1k.min-v2.binpack
- test80-apr2022-16tb7p.min.high-simple-eval-1k.min-v2.binpack
- test80-may2022-16tb7p.high-simple-eval-1k.min-v2.binpack
- test80-jun2022-16tb7p-filter-v6-dd.min-mar2023.unmin.high-simple-eval-1k.min-v2.binpack
- test80-jul2022-16tb7p.v6-dd.min.high-simple-eval-1k.min-v2.binpack
- test80-sep2022-16tb7p-filter-v6-dd.min-mar2023.unmin.high-simple-eval-1k.min-v2.binpack
- test80-nov2022-16tb7p-v6-dd.min.high-simple-eval-1k.min-v2.binpack
/data/S11-mar2024/:
- test80-2022-08-aug-16tb7p.v6-dd.min.binpack
- test80-2022-10-oct-16tb7p.v6-dd.binpack
- test80-2022-12-dec-16tb7p.min.binpack
- test80-2023-01-jan-16tb7p.v6-sk20.min.binpack
- test80-2023-02-feb-16tb7p.v6-sk20.min.binpack
- test80-2023-03-mar-2tb7p.v6-sk16.min.binpack
- test80-2023-04-apr-2tb7p.v6-sk16.min.binpack
- test80-2023-05-may-2tb7p.v6.min.binpack
- test80-2023-06-jun-2tb7p.binpack.min-v2.binpack
- test80-2023-07-jul-2tb7p.binpack.min-v2.binpack
- test80-2023-08-aug-2tb7p.v6.min.binpack
- test80-2023-09-sep-2tb7p.binpack.hse-v6.binpack
- test80-2023-10-oct-2tb7p.binpack.hse-v6.binpack
- test80-2023-11-nov-2tb7p.binpack.hse-v6.binpack
- test80-2023-12-dec-2tb7p.binpack.hse-v6.binpack
- test80-2024-01-jan-2tb7p.binpack.hse-v6.binpack
- test80-2024-02-feb-2tb7p.binpack.hse-v6.binpack
- test80-2024-03-mar-2tb7p.binpack
wld-fen-skipping: False
nnue-pytorch-branch: linrock/nnue-pytorch/128-skipSimpleEval-lt950-torch-compile
engine-test-branch: linrock/Stockfish/L1-128-nolazy
engine-base-branch: linrock/Stockfish/L1-128
start-from-engine-test-net: False
num-epochs: 500
start-lambda: 1.0
end-lambda: 1.0
```
Training data can be found at:
https://robotmoon.com/nnue-training-data/
Passed STC:
https://tests.stockfishchess.org/tests/view/66549c16a86388d5e27daff5
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 196608 W: 51254 L: 50697 D: 94657
Ptnml(0-2): 722, 23244, 49796, 23839, 703
Passed LTC:
https://tests.stockfishchess.org/tests/view/6658d1aa6b0e318cefa90122
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 122538 W: 31332 L: 30835 D: 60371
Ptnml(0-2): 69, 13407, 33811, 13922, 60
closes https://github.com/official-stockfish/Stockfish/pull/5333
bench
2024-06-01 19:59:07 +02:00
rn5f107s2
b34a690cd4
MCP more after a bad singular search
...
The idea is, that if we have the information that the singular search failed low and therefore produced an upperbound score, we can use the score from singularsearch as approximate upperbound as to what bestValue our non ttMoves will produce. If this value is well below alpha, we assume that all non-ttMoves will score below alpha and therfore can skip more moves.
This patch also sets up variables for future patches wanting to use teh singular search result outside of singular extensions, in singularBound and singularValue, meaning further patches using this search result to affect various pruning techniques can be tried.
Passed STC:
https://tests.stockfishchess.org/tests/view/6658d13e6b0e318cefa90120
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 85632 W: 22112 L: 21725 D: 41795
Ptnml(0-2): 243, 10010, 21947, 10349, 267
Passed LTC:
https://tests.stockfishchess.org/tests/view/6658dd356b0e318cefa9016a
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 243978 W: 62014 L: 61272 D: 120692
Ptnml(0-2): 128, 26598, 67791, 27348, 124
closes https://github.com/official-stockfish/Stockfish/pull/5325
bench 1397172
2024-06-01 19:58:20 +02:00
Linmiao Xu
0ef809ac71
Quadratic smallnet threshold with re-evaluation
...
The threshold now decreases more quickly as pawn count decreases,
using the smallnet more compared to before.
Combo of two eval patches:
https://tests.stockfishchess.org/tests/view/66576c5f6b0e318cefa8d26e
https://tests.stockfishchess.org/tests/view/664ced40830eb9f886616a77
Passed STC:
https://tests.stockfishchess.org/tests/view/66588c136b0e318cefa8ff21
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 112608 W: 29336 L: 28908 D: 54364
Ptnml(0-2): 344, 13223, 28718, 13699, 320
Passed LTC:
https://tests.stockfishchess.org/tests/view/6658c8786b0e318cefa900f5
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 108288 W: 27493 L: 27026 D: 53769
Ptnml(0-2): 54, 11821, 29930, 12282, 57
closes https://github.com/official-stockfish/Stockfish/pull/5323
bench 1728074
2024-06-01 19:56:05 +02:00
FauziAkram
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
Joost VandeVondele
54e74919d4
Fix cross from Linux to Windows
...
specifies Windows 7 required
https://learn.microsoft.com/en-us/cpp/porting/modifying-winver-and-win32-winnt?view=msvc-170
closes https://github.com/official-stockfish/Stockfish/pull/5319
No functional change
2024-05-30 23:07:25 +02:00
Tomasz Sobczyk
c8375c2fbd
On linux use sysfs instead of lscpu
...
Use sysfs (https://www.kernel.org/doc/Documentation/ABI/stable/sysfs-devices-node )
to determine processor to NUMA node mapping.
Avoids problems on some machines with high core count where lscpu was showing high cpu utilization.
closes https://github.com/official-stockfish/Stockfish/pull/5315
No functional change
2024-05-30 23:05:25 +02:00
Tomasz Sobczyk
86694b5914
Replace std::from_chars with std::stoull
...
the former was not widely supported, requiring newer compiler versions.
closes https://github.com/official-stockfish/Stockfish/pull/5313
No functional change
2024-05-30 23:05:21 +02:00
Tomasz Sobczyk
f1bb4164bf
Fix process' processor affinity determination on Windows.
...
Specialize and privatize NumaConfig::get_process_affinity.
Only enable NUMA capability for 64-bit Windows.
Following #5307 and some more testing it was determined that the way affinity
was being determined on Windows was incorrect, based on incorrect assumptions
about GetNumaProcessorNodeEx.
This patch fixes the issue by attempting to retrieve the actual process'
processor affinity using Windows API. However one issue persists that is not
addressable due to limitations of Windows, and will have to be considered a
limitation. If affinities were set using SetThreadAffinityMask instead of
SetThreadSelectedCpuSetMasks and GetProcessGroupAffinity returns more than 1
group it is NOT POSSIBLE to determine the affinity programmatically on Windows.
In such case the implementation assumes no affinites are set and will consider
all processors available for execution.
closes https://github.com/official-stockfish/Stockfish/pull/5312
No functional change
2024-05-30 23:05:16 +02:00
Disservin
596fb4842b
NUMA: Fix concurrency counting for windows systems
...
If there is more than 1 processor group, std:🧵 :hardware_concurrency should not be used.
fixes #5307
closes https://github.com/official-stockfish/Stockfish/pull/5311
No functional change
2024-05-30 23:05:01 +02:00
FauziAkram
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
Michael Chaly
b280d2f065
Allow tt cutoffs for shallower depths in certain conditions
...
Current master allows tt cutoffs only when depth
from tt is strictly greater than current node
depth. This patch also allows them when it's equal
and if tt value is lower or equal to beta.
Passed STC:
https://tests.stockfishchess.org/tests/view/66578e2e6b0e318cefa8d447
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 26592 W: 6944 L: 6645 D: 13003
Ptnml(0-2): 67, 3039, 6795, 3318, 77
Passed LTC:
https://tests.stockfishchess.org/tests/view/6657f46b6b0e318cefa8d7e9
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 142572 W: 36315 L: 35776 D: 70481
Ptnml(0-2): 70, 15666, 39288, 16179, 83
closes https://github.com/official-stockfish/Stockfish/pull/5314
Bench: 1368486
2024-05-30 22:54:23 +02:00
FauziAkram
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
Viren6
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
Robert Nurnberg @ elitebook
a4ea183e78
Tweak and update the WDL model
...
This PR updates the internal WDL model, using data from 2.5M games played by SF-dev (3c62ad7https://github.com/official-stockfish/Stockfish/pull/5309
No functional change
2024-05-30 14:29:31 +02:00
Linmiao Xu
35aff79843
Update default main net to nn-ddcfb9224cdb.nnue
...
Created by further tuning the spsa-tuned main net `nn-c721dfca8cd3.nnue`
with the same methods described in https://github.com/official-stockfish/Stockfish/pull/5254
This net was reached at 61k / 120k spsa games at 70+0.7 th 7:
https://tests.stockfishchess.org/tests/view/665639d0a86388d5e27dd259
Passed STC:
https://tests.stockfishchess.org/tests/view/6657d44e6b0e318cefa8d771
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 114688 W: 29775 L: 29344 D: 55569
Ptnml(0-2): 274, 13633, 29149, 13964, 324
Passed LTC:
https://tests.stockfishchess.org/tests/view/6657e1e46b0e318cefa8d7a6
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 88152 W: 22412 L: 21988 D: 43752
Ptnml(0-2): 56, 9560, 24409, 10006, 45
closes https://github.com/official-stockfish/Stockfish/pull/5308
Bench: 1434678
2024-05-30 14:28:07 +02:00
FauziAkram
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
Linmiao Xu
5ab3fe6db8
Simplify blending eval with nnue complexity
...
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/66567377a86388d5e27dd89c
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 144000 W: 37443 L: 37338 D: 69219
Ptnml(0-2): 587, 17260, 36208, 17351, 594
Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/66567f29a86388d5e27dd924
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 112326 W: 28550 L: 28421 D: 55355
Ptnml(0-2): 66, 12732, 30434, 12869, 62
closes https://github.com/official-stockfish/Stockfish/pull/5305
bench 1554486
2024-05-30 14:18:39 +02:00
Shawn Xu
4a2291ed33
Simplify Away Quadruple Extension
...
Passed non-regression VVLTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 90792 W: 23155 L: 23018 D: 44619
Ptnml(0-2): 6, 8406, 28432, 8549, 3
https://tests.stockfishchess.org/tests/view/664ffa4ca86388d5e27d8e7a
Passed non-regression VLTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 288136 W: 72608 L: 72659 D: 142869
Ptnml(0-2): 38, 30258, 83525, 30211, 36
https://tests.stockfishchess.org/tests/view/66551609a86388d5e27db9ae
closes https://github.com/official-stockfish/Stockfish/pull/5293
bench 1501735
2024-05-30 14:16:17 +02:00
xoto10
3c62ad7e07
Add compensation factor to adjust extra time according to time control
...
As stockfish nets and search evolve, the existing time control appears
to give too little time at STC, roughly correct at LTC, and too little
at VLTC+.
This change adds an adjustment to the optExtra calculation. This
adjustment is easy to retune and refine, so it should be easier to keep
up-to-date than the more complex calculations used for optConstant and
optScale.
Passed STC 10+0.1:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 169568 W: 43803 L: 43295 D: 82470
Ptnml(0-2): 485, 19679, 44055, 19973, 592
https://tests.stockfishchess.org/tests/view/66531865a86388d5e27da9fa
Yellow LTC 60+0.6:
LLR: -2.94 (-2.94,2.94) <0.50,2.50>
Total: 209970 W: 53087 L: 52914 D: 103969
Ptnml(0-2): 91, 19652, 65314, 19849, 79
https://tests.stockfishchess.org/tests/view/6653e38ba86388d5e27daaa0
Passed VLTC 180+1.8 :
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 85618 W: 21735 L: 21342 D: 42541
Ptnml(0-2): 15, 8267, 25848, 8668, 11
https://tests.stockfishchess.org/tests/view/6655131da86388d5e27db95f
closes https://github.com/official-stockfish/Stockfish/pull/5297
Bench: 1212167
2024-05-29 19:04:57 +02:00
Shawn Xu
ae7eef51fd
Simplify Fail Low Bonus Formula
...
Tested against PR #5299
Passed Non-regression STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 76352 W: 19797 L: 19619 D: 36936
Ptnml(0-2): 236, 9017, 19509, 9161, 253
https://tests.stockfishchess.org/tests/view/66564f60a86388d5e27dd307
Passed Non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 114624 W: 28946 L: 28821 D: 56857
Ptnml(0-2): 59, 12675, 31714, 12810, 54
https://tests.stockfishchess.org/tests/view/6656543da86388d5e27dd329
closes https://github.com/official-stockfish/Stockfish/pull/5301
Bench: 1212167
2024-05-29 19:01:50 +02:00
mstembera
a2f4e988aa
Fix MSVC NUMA compile issues
...
closes https://github.com/official-stockfish/Stockfish/pull/5298
No functional change
2024-05-29 19:00:37 +02:00
Shawn Xu
c14297a483
Tune Fail Low Bonus
...
Fractional bonus idea is from @Ergodice on
[discord](https://discord.com/channels/435943710472011776/735707599353151579/1244039134499180614 ).
Values are tuned for 149k games at LTC.
SPSA tune:
https://tests.stockfishchess.org/tests/view/6652d5d5a86388d5e27da9d6
Failed STC:
LLR: -2.95 (-2.94,2.94) <0.00,2.00>
Total: 67424 W: 17364 L: 17528 D: 32532
Ptnml(0-2): 238, 8043, 17299, 7909, 223
https://tests.stockfishchess.org/tests/view/66551e1ba86388d5e27db9f9
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 146910 W: 37141 L: 36695 D: 73074
Ptnml(0-2): 84, 16201, 40441, 16643, 86
https://tests.stockfishchess.org/tests/view/66559949a86388d5e27dcc5d
Passed VLTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 27248 W: 6924 L: 6633 D: 13691
Ptnml(0-2): 5, 2744, 7835, 3035, 5
https://tests.stockfishchess.org/tests/view/66563f4da86388d5e27dd27a
closes https://github.com/official-stockfish/Stockfish/pull/5299
Bench: 1390709
2024-05-29 18:58:38 +02:00
Stéphane Nicolet
c7b80f6c8a
Merge pawn count terms using their average
...
This simplification patch merges the pawn count terms in the eval
formula with the material term, updating the offset constant for
the nnue part of the formula from 34000 to 34300 because the average
pawn count in middlegame positions evaluated during search is around 8.
STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 138240 W: 35834 L: 35723 D: 66683
Ptnml(0-2): 527, 16587, 34817, 16626, 563
https://tests.stockfishchess.org/tests/view/6653f474a86388d5e27daaac
LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 454272 W: 114787 L: 115012 D: 224473
Ptnml(0-2): 246, 51168, 124553, 50903, 266
https://tests.stockfishchess.org/tests/view/6654f256a86388d5e27db131
closes https://github.com/official-stockfish/Stockfish/pull/5303
Bench: 1279635
2024-05-29 18:57:32 +02:00
FauziAkram
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
Tomasz Sobczyk
a169c78b6d
Improve performance on NUMA systems
...
Allow for NUMA memory replication for NNUE weights. Bind threads to ensure execution on a specific NUMA node.
This patch introduces NUMA memory replication, currently only utilized for the NNUE weights. Along with it comes all machinery required to identify NUMA nodes and bind threads to specific processors/nodes. It also comes with small changes to Thread and ThreadPool to allow easier execution of custom functions on the designated thread. Old thread binding (WinProcGroup) machinery is removed because it's incompatible with this patch. Small changes to unrelated parts of the code were made to ensure correctness, like some classes being made unmovable, raw pointers replaced with unique_ptr. etc.
Windows 7 and Windows 10 is partially supported. Windows 11 is fully supported. Linux is fully supported, with explicit exclusion of Android. No additional dependencies.
-----------------
A new UCI option `NumaPolicy` is introduced. It can take the following values:
```
system - gathers NUMA node information from the system (lscpu or windows api), for each threads binds it to a single NUMA node
none - assumes there is 1 NUMA node, never binds threads
auto - this is the default value, depends on the number of set threads and NUMA nodes, will only enable binding on multinode systems and when the number of threads reaches a threshold (dependent on node size and count)
[[custom]] -
// ':'-separated numa nodes
// ','-separated cpu indices
// supports "first-last" range syntax for cpu indices,
for example '0-15,32-47:16-31,48-63'
```
Setting `NumaPolicy` forces recreation of the threads in the ThreadPool, which in turn forces the recreation of the TT.
The threads are distributed among NUMA nodes in a round-robin fashion based on fill percentage (i.e. it will strive to fill all NUMA nodes evenly). Threads are bound to NUMA nodes, not specific processors, because that's our only requirement and the OS can schedule them better.
Special care is made that maximum memory usage on systems that do not require memory replication stays as previously, that is, unnecessary copies are avoided.
On linux the process' processor affinity is respected. This means that if you for example use taskset to restrict Stockfish to a single NUMA node then the `system` and `auto` settings will only see a single NUMA node (more precisely, the processors included in the current affinity mask) and act accordingly.
-----------------
We can't ensure that a memory allocation takes place on a given NUMA node without using libnuma on linux, or using appropriate custom allocators on windows (https://learn.microsoft.com/en-us/windows/win32/memory/allocating-memory-from-a-numa-node ), so to avoid complications the current implementation relies on first-touch policy. Due to this we also rely on the memory allocator to give us a new chunk of untouched memory from the system. This appears to work reliably on linux, but results may vary.
MacOS is not supported, because AFAIK it's not affected, and implementation would be problematic anyway.
Windows is supported since Windows 7 (https://learn.microsoft.com/en-us/windows/win32/api/processtopologyapi/nf-processtopologyapi-setthreadgroupaffinity ). Until Windows 11/Server 2022 NUMA nodes are split such that they cannot span processor groups. This is because before Windows 11/Server 2022 it's not possible to set thread affinity spanning processor groups. The splitting is done manually in some cases (required after Windows 10 Build 20348). Since Windows 11/Server 2022 we can set affinites spanning processor group so this splitting is not done, so the behaviour is pretty much like on linux.
Linux is supported, **without** libnuma requirement. `lscpu` is expected.
-----------------
Passed 60+1 @ 256t 16000MB hash: https://tests.stockfishchess.org/tests/view/6654e443a86388d5e27db0d8
```
LLR: 2.95 (-2.94,2.94) <0.00,10.00>
Total: 278 W: 110 L: 29 D: 139
Ptnml(0-2): 0, 1, 56, 82, 0
```
Passed SMP STC: https://tests.stockfishchess.org/tests/view/6654fc74a86388d5e27db1cd
```
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 67152 W: 17354 L: 17177 D: 32621
Ptnml(0-2): 64, 7428, 18408, 7619, 57
```
Passed STC: https://tests.stockfishchess.org/tests/view/6654fb27a86388d5e27db15c
```
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 131648 W: 34155 L: 34045 D: 63448
Ptnml(0-2): 426, 13878, 37096, 14008, 416
```
fixes #5253
closes https://github.com/official-stockfish/Stockfish/pull/5285
No functional change
2024-05-28 18:34:15 +02:00
Disservin
b0287dcb1c
apply const to prefetch parameter
...
closes https://github.com/official-stockfish/Stockfish/pull/5296
No functional change
2024-05-28 18:31:06 +02:00
FauziAkram
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
Shawn Xu
5e98a4e43d
Simplify Away TT Cutoff Return Value Adjustments
...
Passed Non-regression STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 198432 W: 51161 L: 51119 D: 96152
Ptnml(0-2): 772, 23670, 50273, 23746, 755
https://tests.stockfishchess.org/tests/view/66517b9ea86388d5e27da966
Passed Non-regression LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 234150 W: 59200 L: 59197 D: 115753
Ptnml(0-2): 126, 26200, 64404, 26235, 110
https://tests.stockfishchess.org/tests/view/6653a84da86388d5e27daa63
closes https://github.com/official-stockfish/Stockfish/pull/5292
bench 1555200
2024-05-28 18:26:42 +02:00
Shahin M. Shahin
8e1f273c7d
Remove rootDelta branch
...
This makes rootDelta logic easier to understand, recalculating the value
where it belongs so removes an unnecessary branch.
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/664fc147a86388d5e27d8d8e
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 206016 W: 53120 L: 53089 D: 99807
Ptnml(0-2): 591, 20928, 59888, 21061, 540
closes https://github.com/official-stockfish/Stockfish/pull/5289
No functional change
2024-05-26 20:32:41 +02:00
Linmiao Xu
8bc3fd3871
Lower smallnet threshold with tuned eval params
...
The smallnet threshold is now below the training data range
of the current smallnet (simple eval diff > 1k, nn-baff1edelf90.nnue)
when no pawns are on the board.
Params found with spsa at 93k / 120k games at 60+06:
https://tests.stockfishchess.org/tests/view/664fa166a86388d5e27d7d6b
Tuned on top of: https://github.com/official-stockfish/Stockfish/pull/5287
Passed STC:
https://tests.stockfishchess.org/tests/view/664fc8b7a86388d5e27d8dac
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 64672 W: 16731 L: 16371 D: 31570
Ptnml(0-2): 239, 7463, 16517, 7933, 184
Passed LTC:
https://tests.stockfishchess.org/tests/view/664fd5f9a86388d5e27d8dfe
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 210648 W: 53489 L: 52813 D: 104346
Ptnml(0-2): 102, 23129, 58164, 23849, 80
closes https://github.com/official-stockfish/Stockfish/pull/5288
Bench: 1717838
2024-05-26 20:32:30 +02:00
Stéphane Nicolet
4d876275cf
Simplify material weights in evaluation
...
This patch uses the same material weights for the nnue
amplification term and the optimism term in evaluate().
STC:
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 83360 W: 21489 L: 21313 D: 40558
Ptnml(0-2): 303, 9934, 21056, 10058, 329
https://tests.stockfishchess.org/tests/view/664eee69928b1fb18de500d9
LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 192648 W: 48675 L: 48630 D: 95343
Ptnml(0-2): 82, 21484, 53161, 21501, 96
https://tests.stockfishchess.org/tests/view/664fa17aa86388d5e27d7d6e
closes https://github.com/official-stockfish/Stockfish/pull/5287
Bench: 1495602
2024-05-26 20:24:05 +02:00
Muzhen Gaming
61acbfc7d3
VVLTC search tune
...
Parameters were tuned in 2 stages:
1. 127k games at VVLTC:
https://tests.stockfishchess.org/tests/view/6649f8dfb8fa20e74c39f52a .
2. 106k games at VVLTC:
https://tests.stockfishchess.org/tests/view/664bfb77830eb9f886615a9d .
Passed VVLTC 1st sprt:
https://tests.stockfishchess.org/tests/view/664e8dd9928b1fb18de4e410
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 20466 W: 5340 L: 5093 D: 10033
Ptnml(0-2): 0, 1796, 6397, 2037, 3
Passed VVLTC 2nd sprt:
https://tests.stockfishchess.org/tests/view/664eb4aa928b1fb18de4e47d
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 15854 W: 4186 L: 3934 D: 7734
Ptnml(0-2): 1, 1367, 4938, 1621, 0
closes https://github.com/official-stockfish/Stockfish/pull/5286
Bench: 1558110
2024-05-23 21:37:46 +02:00
Linmiao Xu
365aa85dce
Remove material imbalance param when adjusting optimism
...
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/664d033d830eb9f886616aff
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 102144 W: 26283 L: 26135 D: 49726
Ptnml(0-2): 292, 12201, 25991, 12243, 345
Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/664d5c00830eb9f886616cb3
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 250032 W: 63022 L: 63036 D: 123974
Ptnml(0-2): 103, 27941, 68970, 27871, 131
closes https://github.com/official-stockfish/Stockfish/pull/5284
Bench: 1330940
2024-05-23 21:37:46 +02:00
Muzhen Gaming
72a345873d
Revert "Reduce When TTValue is Above Alpha"
...
The patch regressed significantly at longer time controls. In
particular, the `depth--` behavior was predicted to scale badly based on
data from other variations of the patch.
Passed VVLTC 1st sprt:
https://tests.stockfishchess.org/tests/view/664d45cf830eb9f886616c7d
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 51292 W: 13242 L: 12954 D: 25096
Ptnml(0-2): 5, 4724, 15896, 5020, 1
Passed VVLTC 2nd sprt:
https://tests.stockfishchess.org/tests/view/664e641a928b1fb18de4e385
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 41884 W: 10933 L: 10634 D: 20317
Ptnml(0-2): 1, 3759, 13125, 4054, 3
closes https://github.com/official-stockfish/Stockfish/pull/5283
Bench: 1503815
2024-05-23 21:37:46 +02:00
cj5716
c6a1e7fd42
Optimise pairwise multiplication
...
This speedup was first inspired by a comment by @AndyGrant on my recent
PR "If mullo_epi16 would preserve the signedness, then this could be
used to remove 50% of the max operations during the halfkp-pairwise
mat-mul relu deal."
That got me thinking, because although mullo_epi16 did not preserve the
signedness, mulhi_epi16 did, and so we could shift left and then use
mulhi_epi16, instead of shifting right after the mullo.
However, due to some issues with shifting into the sign bit, the FT
weights and biases had to be multiplied by 2 for the optimisation to
work.
Speedup on "Arch=x86-64-bmi2 COMP=clang", courtesy of @Torom
Result of 50 runs
base (...es/stockfish) = 962946 +/- 1202
test (...ise-max-less) = 979696 +/- 1084
diff = +16750 +/- 1794
speedup = +0.0174
P(speedup > 0) = 1.0000
CPU: 4 x Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
Hyperthreading: on
Also a speedup on "COMP=gcc", courtesy of Torom once again
Result of 50 runs
base (...tockfish_gcc) = 966033 +/- 1574
test (...max-less_gcc) = 983319 +/- 1513
diff = +17286 +/- 2515
speedup = +0.0179
P(speedup > 0) = 1.0000
CPU: 4 x Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
Hyperthreading: on
Passed STC:
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 67712 W: 17715 L: 17358 D: 32639
Ptnml(0-2): 225, 7472, 18140, 7759, 260
https://tests.stockfishchess.org/tests/view/664c1d75830eb9f886616906
closes https://github.com/official-stockfish/Stockfish/pull/5282
No functional change
2024-05-23 21:37:46 +02:00
Shawn Xu
c39b98b9e3
Simplify Away History Updates in Multicut
...
Passed Non-regression STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 44896 W: 11600 L: 11388 D: 21908
Ptnml(0-2): 140, 5230, 11532, 5370, 176
https://tests.stockfishchess.org/tests/view/664cee31830eb9f886616a80
Passed Non-regression LTC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 56832 W: 14421 L: 14234 D: 28177
Ptnml(0-2): 37, 6251, 15643, 6458, 27
https://tests.stockfishchess.org/tests/view/664cfd4e830eb9f886616aa6
closes https://github.com/official-stockfish/Stockfish/pull/5281
Bench: 1119412
2024-05-23 21:30:33 +02:00
Linmiao Xu
1dcffa6210
Comment about re-evaluating positions
...
While the smallNet bool is no longer used as of now,
setting it to false upon re-evaluation represents the
correct eval state.
closes https://github.com/official-stockfish/Stockfish/pull/5279
No functional change
2024-05-23 21:30:24 +02:00
Viren6
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
Dubslow
ed79745bb9
Improve comments about DEPTH constants
...
Also "fix" movepicker to allow depths between CHECKS and NO_CHECKS,
which makes them easier to tweak (not that they get tweaked hardly ever)
(This was more beneficial when there was a third stage to DEPTH_QS, but
it's still an improvement now)
closes https://github.com/official-stockfish/Stockfish/pull/5205
No functional change
2024-05-23 21:29:11 +02:00
Linmiao Xu
c14b69790a
Lower smallnet threshold with updated eval divisors
...
Params found after 30k spsa games at 60+0.6, with initial
values from 64k spsa games at 45+0.45
First spsa with 64k / 120k games at 45+0.45:
https://tests.stockfishchess.org/tests/view/664a561b5fc7b70b8817c663
https://tests.stockfishchess.org/tests/view/664ae88e830eb9f8866146f9
Second spsa with 30k / 120k games at 60+0.6:
https://tests.stockfishchess.org/tests/view/664be227830eb9f886615a36
Values found at 10k games at 60+0.6 also passed STC and LTC:
https://tests.stockfishchess.org/tests/view/664bf4bd830eb9f886615a72
https://tests.stockfishchess.org/tests/view/664c0905830eb9f886615abf
Passed STC:
https://tests.stockfishchess.org/tests/view/664c139e830eb9f886615af2
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 69408 W: 18216 L: 17842 D: 33350
Ptnml(0-2): 257, 8275, 17401, 8379, 392
Passed LTC:
https://tests.stockfishchess.org/tests/view/664cdaf7830eb9f886616a24
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 35466 W: 9075 L: 8758 D: 17633
Ptnml(0-2): 27, 3783, 9794, 4104, 25
closes https://github.com/official-stockfish/Stockfish/pull/5280
bench 1301287
2024-05-21 22:06:17 +02:00
MinetaS
c86ec8ec29
Remove cutoffCnt margin adjustment in razoring
...
Passed non-regression STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 65344 W: 16767 L: 16578 D: 31999
Ptnml(0-2): 198, 7557, 16987, 7718, 212
https://tests.stockfishchess.org/tests/view/664bd895830eb9f886615a26
Passed non-regression LTC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 35214 W: 8999 L: 8791 D: 17424
Ptnml(0-2): 16, 3804, 9760, 4010, 17
https://tests.stockfishchess.org/tests/view/664bead5830eb9f886615a52
closes https://github.com/official-stockfish/Stockfish/pull/5278
Bench: 1296223
2024-05-21 08:46:12 +02:00
FauziAkram
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
Shawn Xu
f27a9be29c
Reduce When TTValue is Above Alpha
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 53376 W: 13818 L: 13476 D: 26082
Ptnml(0-2): 156, 6212, 13626, 6522, 172
https://tests.stockfishchess.org/tests/view/664aa261830eb9f8866145e5
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 393444 W: 100096 L: 99042 D: 194306
Ptnml(0-2): 191, 43516, 108248, 44582, 185
https://tests.stockfishchess.org/tests/view/664ab54f830eb9f88661463c
closes https://github.com/official-stockfish/Stockfish/pull/5276
Bench: 1024562
2024-05-21 08:40:37 +02:00
Michael Chaly
daf9787de1
Rescale pawn history updates
...
This patch is somewhat of a continuation of recent pawn history gainers.
It makes pawn history updates after search twice smaller. Since on average they make pawn history more negative offset is changed to lower value to remain average value approximately the same.
https://tests.stockfishchess.org/tests/view/664b3af9830eb9f886614aab
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 170464 W: 44239 L: 43724 D: 82501
Ptnml(0-2): 523, 20278, 43128, 20767, 536
Passed LTC against pending PR :
https://tests.stockfishchess.org/tests/view/664b8c58830eb9f886614b64
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 98178 W: 25015 L: 24569 D: 48594
Ptnml(0-2): 48, 10769, 27005, 11223, 44
closes https://github.com/official-stockfish/Stockfish/pull/5275
Bench: 1343175
2024-05-21 08:36:32 +02:00
FauziAkram
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
Michael Chaly
0c797367a3
Update correction history in case of successful null move pruning
...
Since null move pruning uses the same position it makes some sense to try to update correction history there in case of fail high.
Update value is 4 times less than normal update.
Passed STC:
https://tests.stockfishchess.org/tests/view/664a011cae57c1758ac5b4dd
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 419360 W: 108390 L: 107505 D: 203465
Ptnml(0-2): 1416, 49603, 106724, 50554, 1383
Passed LTC:
https://tests.stockfishchess.org/tests/view/664a53d95fc7b70b8817c65b
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 193518 W: 49076 L: 48434 D: 96008
Ptnml(0-2): 89, 21335, 53263, 21989, 83
closes https://github.com/official-stockfish/Stockfish/pull/5272
bench 1301487
2024-05-21 08:17:20 +02:00
Linmiao Xu
4d88a63e60
Re-eval only if smallnet output flips from simple eval
...
Recent attempts to change the smallnet nnue re-eval
threshold did not show much elo difference:
https://tests.stockfishchess.org/tests/view/664a29bb25a9058c4d21d53c
https://tests.stockfishchess.org/tests/view/664a299925a9058c4d21d53a
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/664a3ea95fc7b70b8817aee2
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 22304 W: 5905 L: 5664 D: 10735
Ptnml(0-2): 67, 2602, 5603, 2783, 97
Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/664a43d35fc7b70b8817aef4
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 37536 W: 9667 L: 9460 D: 18409
Ptnml(0-2): 25, 4090, 10321, 4317, 15
closes https://github.com/official-stockfish/Stockfish/pull/5271
bench 1287409
2024-05-21 08:13:25 +02:00
Stefan Geschwentner
81e21a69f0
Simplify the recently introduced ply-based cmh bonus factor.
...
Replace it with a constant which is an approximation of the limit of the factor.
STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 120064 W: 30967 L: 30836 D: 58261
Ptnml(0-2): 421, 14238, 30608, 14319, 446
https://tests.stockfishchess.org/tests/view/6649d146b8fa20e74c39f4ad
LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 53856 W: 13719 L: 13530 D: 26607
Ptnml(0-2): 31, 5879, 14922, 6062, 34
https://tests.stockfishchess.org/tests/view/664a027fae57c1758ac5b4ee
closes https://github.com/official-stockfish/Stockfish/pull/5270
Bench: 1355618
2024-05-21 08:11:17 +02:00
Michael Chaly
4a66a7c9ca
Do more aggressive pawn history updates
...
Tweak of recent patch that made pawn history to update for move that caused a fail low - and setting up default value of it to -900. This patch makes it more aggressive - twice bigger updates and default value -1100.
Passed STC:
https://tests.stockfishchess.org/tests/view/6648c5d4308cceea45533b5d
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 235200 W: 61090 L: 60476 D: 113634
Ptnml(0-2): 763, 27952, 59651, 28376, 858
Passed LTC:
https://tests.stockfishchess.org/tests/view/664a1008ae57c1758ac5b523
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 20076 W: 5193 L: 4908 D: 9975
Ptnml(0-2): 7, 2105, 5534, 2380, 12
closes https://github.com/official-stockfish/Stockfish/pull/5268
Bench: 1590474
2024-05-21 08:07:22 +02:00
Stefan Geschwentner
a3bb7e626d
Tweak continuation history bonus dependent on ply.
...
This patch is based on following tuning https://tests.stockfishchess.org/tests/view/6648b2eb308cceea45533abe by only using the tuned factors for the continuation history.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 99904 W: 25865 L: 25457 D: 48582
Ptnml(0-2): 281, 11705, 25578, 12101, 287
https://tests.stockfishchess.org/tests/view/6648c136308cceea45533af8
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 36402 W: 9362 L: 9039 D: 18001
Ptnml(0-2): 20, 3952, 9951, 4241, 37
https://tests.stockfishchess.org/tests/view/6648ee3cb8fa20e74c39f3fd
closes https://github.com/official-stockfish/Stockfish/pull/5267
Bench: 1917762
2024-05-21 08:04:44 +02:00
