Berektassuly and Joost VandeVondele
8416ccafff
fix Makefile universal build selection
...
and remove armv8 left-over
closes https://github.com/official-stockfish/Stockfish/pull/6876
No functional change
2026-06-06 10:01:37 +02:00
tobi437a and Joost VandeVondele
133731f331
Simplify away unused CorrHistType variants
...
After the introduction of UnifiedCorrectionHistory, the Pawn, Minor and NonPawn entries in CorrHistType are dead - only PieceTo and Continuation are referenced via CorrectionHistory<T>. Drop them, along with the now unreachable default template and the NonPawn specialization. Reduce the primary CorrHistTypedef template to a forward declaration so that any future stray use of an unsupported tag fails to compile.
closes https://github.com/official-stockfish/Stockfish/pull/6828
No functional change
2026-05-19 18:42:17 +02:00
Tony Wang and Joost VandeVondele
5095cd16c9
Update main network to nn-fcf986aea78a.nnue
...
Passed STC:
https://tests.stockfishchess.org/tests/view/69ef80071e5788938e86a302
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 32000 W: 8549 L: 8231 D: 15220
Ptnml(0-2): 124, 3717, 8024, 3987, 148
Passed LTC:
https://tests.stockfishchess.org/tests/view/69f046ba1e5788938e86a42f
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 149646 W: 38739 L: 38186 D: 72721
Ptnml(0-2): 119, 16353, 41326, 16906, 119
New trainer:
official-stockfish/nnue-pytorch#430
Recipe:
TonyCongqianWang/nettest@104ed33
closes https://github.com/official-stockfish/Stockfish/pull/6790
Bench: 2344696
2026-05-04 08:42:55 +02:00
Ryan Lefkowitz and Joost VandeVondele
bb5f0100b0
fix syzygy crash on Apple Silicon by unrolling tbprobe adjustment loop
...
A bit tricky to identify, but in `apple-silicon` builds, specifying a value for
`SyzygyPath` could still lead to crashes at certain depths from a
SIGBUS/SIGSEGV.
This PR replaces the `std::count_if()` adjustment in `tbprobe.cpp`'s
`do_probe_table()` with an annotated handwritten loop, avoiding the clang/LTO
miscompilation behind the crash.
closes https://github.com/official-stockfish/Stockfish/pull/6721
No functional change.
2026-04-15 19:05:14 +02:00
MARLIN-Tools and Disservin
3c04b5c429
Fix Depth 1 bug at very low time controls, some fishtesting workers, and delayed move senders like Arena.
...
Non-Regression STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 98208 W: 25423 L: 25276 D: 47509
Ptnml(0-2): 271, 10713, 26994, 10850, 276
https://tests.stockfishchess.org/tests/view/69ad43c21d849c824c6afe82
-
Hell VVSTC (0.2+0.02)
LLR: 2.70 (-2.94,2.94) <0.00,2.00>
Total: 688 W: 660 L: 11 D: 17
Ptnml(0-2): 1, 0, 10, 15, 318
https://tests.stockfishchess.org/tests/view/69ae4bea1d849c824c6b00b0
-
Sudden Death (1+0)
LLR: 2.19 (-2.94,2.94) <-1.75,0.25>
Total: 538 W: 536 L: 0 D: 2
Ptnml(0-2): 0, 0, 0, 2, 267
https://tests.stockfishchess.org/tests/live_elo/69ae6c031d849c824c6b00dc
-
Sudden Death (5+0)
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 22248 W: 6058 L: 5802 D: 10388
Ptnml(0-2): 214, 2420, 5583, 2710, 197
https://tests.stockfishchess.org/tests/view/69ae6dd01d849c824c6b00ee
-
Fixes #6639
closes https://github.com/official-stockfish/Stockfish/pull/6659
No functional change
2026-03-18 20:49:06 +01:00
ZlomenyMesic and Disservin
e20ef7ed12
Disable IIR and quiet shallow pruning in PV lines
...
Disable IIR and quiet shallow pruning in nodes that are part of the PV
line from the previous search iteration. This is done by storing the PV
in Worker and adding a followPV flag to Stack. The new flag may also be
used in other pruning techniques, allowing further improvement.
Passed STC:
```
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 63776 W: 16679 L: 16323 D: 30774
Ptnml(0-2): 169, 7441, 16377, 7667, 234
```
https://tests.stockfishchess.org/tests/view/69aad1a7d0f65de95886e289
Passed LTC:
```
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 87342 W: 22421 L: 22000 D: 42921
Ptnml(0-2): 40, 9443, 24299, 9834, 55
```
https://tests.stockfishchess.org/tests/view/69ab5993cb31ee884aed629d
closes https://github.com/official-stockfish/Stockfish/pull/6656
Bench: 2434614
2026-03-18 20:49:06 +01:00
Ryan Hirsch and Joost VandeVondele
0571e4e390
More NMP when improving
...
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 89472 W: 23291 L: 22895 D: 43286
Ptnml(0-2): 317, 10389, 22942, 10757, 331
https://tests.stockfishchess.org/tests/view/699f070c3ece4c464328a26f
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 95880 W: 24537 L: 24098 D: 47245
Ptnml(0-2): 55, 10259, 26880, 10684, 62
https://tests.stockfishchess.org/tests/view/699fb9be44b9136df1165ded
closes https://github.com/official-stockfish/Stockfish/pull/6638
bench: 2534375
2026-02-28 11:58:49 +01:00
lemteay and Disservin
005f0f9b2a
Raise inline threshold for clang/llvm
...
Passed STC:
https://tests.stockfishchess.org/tests/view/696884a56d118e46e1731473
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 29952 W: 7843 L: 7549 D: 14560
Ptnml(0-2): 72, 3215, 8118, 3489, 82
.text area size:
```
master(eb5a65ahttps://github.com/official-stockfish/Stockfish/pull/6550
No functional change
2026-02-08 15:22:06 +01:00
Pieter te Brake and Joost VandeVondele
2321cf2f77
Simplify en passant square update in Position::do_move().
...
Passed non-regression STC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 119680 W: 31011 L: 30884 D: 57785
Ptnml(0-2): 354, 13231, 32575, 13294, 386
https://tests.stockfishchess.org/tests/view/6973b06c6cd60a8e97ca62e5
closes https://github.com/official-stockfish/Stockfish/pull/6565
No functional change
2026-02-04 18:17:23 +01:00
Jakub Ciolek and Joost VandeVondele
c27c1747e3
qsearch: prevent bestValue from going down
...
The bestValue can sometimes go down. This happens 2% of the time or so.
This fix stops it from decreasing.
Failed gainer STC:
LLR: -2.94 (-2.94,2.94) <0.00,2.00>
Total: 146176 W: 37930 L: 37976 D: 70270
Ptnml(0-2): 480, 17422, 37366, 17304, 516
https://tests.stockfishchess.org/tests/view/6953be19572093c1986da66a
Passed Non-regression LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 257796 W: 65662 L: 65683 D: 126451
Ptnml(0-2): 164, 28247, 72087, 28246, 154
https://tests.stockfishchess.org/tests/view/69554ff0d844c1ce7cc7e333
closes https://github.com/official-stockfish/Stockfish/pull/6520
fixes https://github.com/official-stockfish/Stockfish/issues/6519
Bench: 2477446
2026-01-06 12:08:08 +01:00
KazApps and Disservin
74303ca7f9
Update AUTHORS (KazApps)
...
closes https://github.com/official-stockfish/Stockfish/pull/6454
No functional change
2025-11-30 21:58:35 +01:00
+1
8e5392d79a
Update NNUE architecture to SFNNv10 with Threat Inputs and net nn-49c1193b131c.nnue
...
This commit introduces Full Threat Input features, which are a subset of Piece(Square)-Piece(Square) pairs. In any given position, the active features consist of pairs where the second piece’s square lies in the attack set of the first piece. This is an extremely simplified explanation that leaves out many details. The already-used HalfKAv2_hm feature set completes the input features.
Minor quantization changes have also been made.
The net nn-49c1193b131c.nnue was trained by vondele using the following setup: https://github.com/vondele/nettest/blob/7de71238e9b295e3f88ed7c9c5936af632c9b981/threats.yaml
A graphical version of an earlier scheme (with less refinement) that illustrates the core concepts can be found attached.
[NewInputs.pdf](https://github.com/user-attachments/files/23478441/NewInputs.pdf )
Further information, as well as a brief description of the history of development, can be found attached.
[Stockfish threat inputs PR summary.pdf](https://github.com/user-attachments/files/23478634/Stockfish.threat.inputs.PR.summary.pdf )
This has been a huge effort spanning over half a year, with the original [discussion thread](https://discord.com/channels/435943710472011776/1336647760388034610 ) reaching over 11k messages. Thanks to everyone who has contributed.
Monty PRs:
https://github.com/official-monty/Monty/pull/87 (Initial threat input PR)
https://github.com/official-monty/Monty/pull/114 (Fixed threat indexing to take into account colour correctly)
https://github.com/official-monty/Monty/pull/116 (i8 quantisation of weights whilst keeping calculations in i16)
Yukari commit:
https://github.com/yukarichess/yukari/commit/2d482c64a79cec03cf4987d5289334b9cdc737bc (Threat inputs merged)
Plentychess PRs:
https://github.com/Yoshie2000/PlentyChess/pull/400 (Threat inputs merged)
https://github.com/Yoshie2000/PlentyChess/pull/411 (Threat input weights quantised to i8)
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 63424 W: 16956 L: 16591 D: 29877
Ptnml(0-2): 276, 7522, 15797, 7795, 322
https://tests.stockfishchess.org/tests/view/69105b3dec1d00d2c195c569
Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 27876 W: 7417 L: 7110 D: 13349
Ptnml(0-2): 23, 3033, 7530, 3318, 34
https://tests.stockfishchess.org/tests/view/6910d817ec1d00d2c195c66e
Passed VVLTC (Hash accidentally set to 1/2 normal value for both sides):
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 12458 W: 3353 L: 3102 D: 6003
Ptnml(0-2): 0, 1106, 3767, 1355, 1
https://tests.stockfishchess.org/tests/view/69115a26ec1d00d2c195c7cd
This version has also passed non-regression LTC against the originally passed version:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 51144 W: 13086 L: 12903 D: 25155
Ptnml(0-2): 22, 5167, 15018, 5336, 29
https://tests.stockfishchess.org/tests/view/69138a317ca87818523314bf
LTC elo estimate on ARM:
1 patch : 13.9 1.9 38296.5 73728 52
2 master : 0.0 ---- 35431.5 73728 48
closes https://github.com/official-stockfish/Stockfish/pull/6411
bench: 2626086
Co-authored-by: Shawn Xu <xu107288696@gmail.com >
Co-authored-by: Timothy Herchen <timothy.herchen@gmail.com >
Co-authored-by: Viren6 <94880762+Viren6@users.noreply.github.com >
Co-authored-by: Yoshie2000 <patrick.leonhardt@gmx.net >
Co-authored-by: Joost Vandevondele <Joost.VandeVondele@gmail.com >
Co-authored-by: rn5f107s2 <clemens.lerchl@gmail.com >
Co-authored-by: cj5716 <125858804+cj5716@users.noreply.github.com >
Co-authored-by: AliceRoselia <63040919+AliceRoselia@users.noreply.github.com >
Co-authored-by: Linmiao Xu <linmiao.xu@gmail.com >
Co-authored-by: Disservin <disservin.social@gmail.com >
2025-11-12 10:49:39 +01:00
Kieren Pearson and Joost VandeVondele
75edbee01e
Use huge pages for worker data
...
As the worker data is quite large (28MB after #6350 ) we can make use of huge pages as a speedup.
prior to #6350
STC passed elo gaining bounds:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 166272 W: 43479 L: 42993 D: 79800
Ptnml(0-2): 540, 17598, 46365, 18102, 531
https://tests.stockfishchess.org/tests/view/68e9f3c0d323fd15c04e3ba4
Tested the speedup on a large machine with speedtest:
==== master ====
Average (over 20): 288644510
==== largePageWorker ====
Average (over 20): 292082422
Test after #6350 :
==== rustam-cpp-testPR ====
Average (over 20): 291035351
==== rustam-cpp-testPR-pages ====
Average (over 20): 291937367
https://github.com/official-stockfish/Stockfish/pull/6359
No functional change
2025-10-14 17:46:13 +02:00
Daniel Monroe and Joost VandeVondele
e7a4708ad5
Remove condition in qsearch
...
Instead of skipping non-captures when pawn history is exceptionally high, skip all non-captures
Passed non-regression STC
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 38016 W: 10018 L: 9795 D: 18203
Ptnml(0-2): 155, 4346, 9755, 4625, 127
https://tests.stockfishchess.org/tests/view/68e43d4aa017f472e763db2e
Passed rebased non-regression LTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 96048 W: 24854 L: 24710 D: 46484
Ptnml(0-2): 47, 10504, 26780, 10644, 49
https://tests.stockfishchess.org/tests/view/68e59352a017f472e763dcf9
closes https://github.com/official-stockfish/Stockfish/pull/6355
bench 2343840
2025-10-14 17:32:32 +02:00
rustam-cpp and Joost VandeVondele
63d449d1d9
bigger PAWN_HISTORY_SIZE
...
STC (10+0.1 th1) was accepted:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 75712 W: 19701 L: 19326 D: 36685
Ptnml(0-2): 254, 8738, 19513, 9081, 270
https://tests.stockfishchess.org/tests/view/68e286d5fa806e2e8393d160
LTC (60+0.6 th1) was accepted:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 108492 W: 28068 L: 27604 D: 52820
Ptnml(0-2): 60, 11639, 30390, 12091, 66
https://tests.stockfishchess.org/tests/view/68e3e564a017f472e763dac0
closes https://github.com/official-stockfish/Stockfish/pull/6350
bench 2128316
2025-10-14 17:27:42 +02:00
nicolasduhamel and Joost VandeVondele
5c93616a3f
Adjust aspiration window
...
Narrow the aspiration window after fail high.
Passed STC:
LLR: 2.98 (-2.94,2.94) <0.00,2.00>
Total: 51296 W: 13550 L: 13207 D: 24539
Ptnml(0-2): 165, 5971, 13052, 6276, 184
https://tests.stockfishchess.org/tests/view/68d99afffa806e2e8393b7ae
Passed LTC;
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 87780 W: 22795 L: 22375 D: 42610
Ptnml(0-2): 52, 9340, 24694, 9744, 60
https://tests.stockfishchess.org/tests/view/68dae0a6fa806e2e8393baad
See the comments in #6293 discussing the mechanisms leading to issue #6296
closes https://github.com/official-stockfish/Stockfish/pull/6337
Bench: 2336606
2025-10-05 09:23:02 +02:00
Timothy Herchen and Joost VandeVondele
9b164d9520
Shave some instructions off a hot loop in affine transform
...
On x86, GCC generates highly suboptimal code for this loop in its old form,
about 2x as many instructions as necessary. This decreases throughput
especially in an SMT setting. Clang does a better job but this change still has
some improvement. Note that the std::ptrdiff_t type is not optional; using an
unsigned type brings back the bad assembly. (Not sure why, but it seems
reliable on all the GCC versions I tested.)
passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 44672 W: 11841 L: 11527 D: 21304
Ptnml(0-2): 165, 4625, 12415, 4993, 138
https://tests.stockfishchess.org/tests/view/68d8111efa806e2e8393b10e
closes https://github.com/official-stockfish/Stockfish/pull/6331
No functional change
2025-09-28 21:04:29 +02:00
Arseniy Surkov and Joost VandeVondele
731ad9bbc3
Simplify adjust_key50 template
...
Remove the AfterMove template from the adjust_key50 function, which is only ever called with false.
closes https://github.com/official-stockfish/Stockfish/pull/6278
No functional change
2025-08-30 15:17:57 +02:00
Kevin Lu and Joost VandeVondele
0db4a1bee9
Remove completedDepth condition for SE
...
Just removing the term
Passed STC:
LLR: 3.27 (-2.94,2.94) <-1.75,0.25>
Total: 179840 W: 47211 L: 47126 D: 85503
Ptnml(0-2): 567, 17929, 52879, 17942, 603
https://tests.stockfishchess.org/tests/view/688bdd88502b34dd5e7111ea
Passed LTC:
LLR: 3.26 (-2.94,2.94) <-1.75,0.25>
Total: 150708 W: 38738 L: 38637 D: 73333
Ptnml(0-2): 79, 12922, 49262, 13001, 90
https://tests.stockfishchess.org/tests/view/688ce857f17748b4d23c8026
Passed VLTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 288312 W: 74104 L: 74152 D: 140056
Ptnml(0-2): 44, 26732, 90657, 26674, 49
https://tests.stockfishchess.org/tests/view/688ec4f57d68fe4f7f130ee3
closes https://github.com/official-stockfish/Stockfish/pull/6221
functional at higher depths
Bench: 3002300
2025-08-16 12:01:19 +02:00
Stockfisher69 and Joost VandeVondele
303fe9a164
Simplification: Futility pruning for captures
...
tested in final form as simplication
passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 113682 W: 29199 L: 29074 D: 55409
Ptnml(0-2): 68, 12359, 31859, 12490, 65
https://tests.stockfishchess.org/tests/view/688e85a17d68fe4f7f130e24
earlier test, equivalent:
passed STC:
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 120224 W: 31621 L: 31176 D: 57427
Ptnml(0-2): 415, 14167, 30567, 14484, 479
https://tests.stockfishchess.org/tests/view/68888bdd7b562f5f7b732643
closes https://github.com/official-stockfish/Stockfish/pull/6209
Bench: 2661621
2025-08-09 08:49:12 +02:00
Jost Triller and Joost VandeVondele
377a3a5269
Depth dependent reduction threshold when full-depth re-search
...
STC: https://tests.stockfishchess.org/tests/view/68894d577b562f5f7b73273b
LLR: 2.98 (-2.94,2.94) <0.00,2.00>
Total: 155072 W: 40651 L: 40150 D: 74271
Ptnml(0-2): 609, 18271, 39292, 18738, 626
LTC: https://tests.stockfishchess.org/tests/view/688c2705502b34dd5e71127a
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 321012 W: 82891 L: 81995 D: 156126
Ptnml(0-2): 227, 34421, 90285, 35375, 198
This commit was generated using qwen3-235b-a22b-thinking-2507:
Prompt: https://rentry.co/iqtaoht7
Reasoning/thinking: https://rentry.co/wm6t9hye
closes https://github.com/official-stockfish/Stockfish/pull/6210
Bench: 2983938
2025-08-04 15:12:55 +02:00
CSTENTOR and Joost VandeVondele
57b32f3e60
Make Resetting the Aspiration Window after FailLow more aggressive
...
Sets beta=(3alpha+beta)/4 when failLow. Before it was beta=(alpha+beta)/2, even
though in theory we should be getting an upper bound from a failLow, we can’t
trust the score that caused the failLow. Therefore beta=alpha doesn’t work. I
made the buffer between the new beta to the bestValue that caused the failLow
smaller.
passed STC:
https://tests.stockfishchess.org/tests/view/688674947b562f5f7b7315b5
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 119616 W: 31253 L: 30818 D: 57545
Ptnml(0-2): 313, 14028, 30724, 14397, 346
passed LTC:
https://tests.stockfishchess.org/tests/view/6887e0ad7b562f5f7b731afc
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 96978 W: 24905 L: 24466 D: 47607
Ptnml(0-2): 59, 10376, 27183, 10809, 62
closes https://github.com/official-stockfish/Stockfish/pull/6197
bench: 3085519
2025-08-02 16:12:12 +02:00
Styx and Joost VandeVondele
ab83d320b8
Simplify NMP condition
...
As this is tried only for cutNode, and all children of cutNodes will be nonCutNodes, the guard condition is redundant.
Simplification just removes the unnecessary condition (always true).
closes https://github.com/official-stockfish/Stockfish/pull/6187
No functional change
2025-07-28 20:11:40 +02:00
aronpetkovski and Joost VandeVondele
a516b517d3
Simplify eval >= beta condition from NMP
...
It seems that now only checking if static eval is above beta by some margin is all that's necessary.
Passed Non-Regression STC
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 227264 W: 58430 L: 58421 D: 110413
Ptnml(0-2): 532, 26559, 59454, 26542, 545
https://tests.stockfishchess.org/tests/view/68763a77432ca24f6388c766
Passed Non-Regression LTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 72048 W: 18622 L: 18455 D: 34971
Ptnml(0-2): 26, 7775, 20272, 7908, 43
https://tests.stockfishchess.org/tests/view/687c9f2b6e17e7fa3939b0c5
closes https://github.com/official-stockfish/Stockfish/pull/6175
Bench: 2759840
2025-07-24 10:38:13 +02:00
87 and Joost VandeVondele
8c2d21f91a
Speedup movegen with VBMI2
...
Passed STC
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 166720 W: 43191 L: 42701 D: 80828
Ptnml(0-2): 348, 18567, 45069, 18999, 377
https://tests.stockfishchess.org/tests/view/686ae98dfe0f2fe354c0c867
Refactor movegen to emit to a vector with 16-bit elements, which enables a
speedup with AVX512-VBMI2 when writing moves to the move list.
Very crude timing measurements of perft via timing ./stockfish "go perft 7"
demonstrates approximately 17% perft speedup:
Summary
./Stockfish-dev/src/stockfish 'go perft 7' ran
1.17 ± 0.04 times faster than ./Stockfish-base/src/stockfish 'go perft 7'
Estimated overall nps increase of 0.4% via speedtest: 33605229 -> 33749825
(many thanks JonathanHallstrom).
The corresponding arch is avx512icl as it is a good baseline for consumer
avx-512 feature set support; Intel Ice Lake was the first consumer AVX-512 CPU
and it is a decent subset of what AMD Zen 4 supports.
closes https://github.com/official-stockfish/Stockfish/pull/6153
No functional change
2025-07-24 10:08:35 +02:00
Кирилл Зарипов and Joost VandeVondele
bebffc5622
Adjust futility pruning thresholds using history
...
Passed STC:
https://tests.stockfishchess.org/tests/view/6833095a6ec7634154f9b5b3
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 56896 W: 14946 L: 14604 D: 27346
Ptnml(0-2): 117, 6674, 14561, 6942, 154
Passed LTC:
https://tests.stockfishchess.org/tests/view/6833179d6ec7634154f9b5da
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 200742 W: 51660 L: 51012 D: 98070
Ptnml(0-2): 96, 21520, 56473, 22204, 78
Passed Non-regression SMP STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 29080 W: 7591 L: 7373 D: 14116
Ptnml(0-2): 38, 3178, 7881, 3414, 29
https://tests.stockfishchess.org/tests/view/6833689d6ec7634154f9c2ba
closes https://github.com/official-stockfish/Stockfish/pull/6092
Bench: 2305697
2025-05-25 21:24:09 +02:00
Mapika and Joost VandeVondele
1b6975ac41
Add quiet move streak tracking to search stack
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 109344 W: 28473 L: 28053 D: 52818
Ptnml(0-2): 320, 12756, 28085, 13206, 305
https://tests.stockfishchess.org/tests/view/6828c43e6ec7634154f99a10
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 76308 W: 19721 L: 19323 D: 37264
Ptnml(0-2): 39, 8145, 21386, 8547, 37
https://tests.stockfishchess.org/tests/view/6828f65a6ec7634154f99b72
closes https://github.com/official-stockfish/Stockfish/pull/6066
Bench: 2161814
2025-05-19 07:27:26 +02:00
breatn and Joost VandeVondele
f590767b91
Adaptive beta cut
...
passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 197088 W: 51084 L: 50533 D: 95471
Ptnml(0-2): 547, 23201, 50577, 23592, 627
https://tests.stockfishchess.org/tests/view/680604d798cd372e3aea58fe
passed LTC
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 127950 W: 32719 L: 32214 D: 63017
Ptnml(0-2): 69, 13825, 35673, 14348, 60
https://tests.stockfishchess.org/tests/view/6805eae498cd372e3aea588a
closes https://github.com/official-stockfish/Stockfish/pull/6012
bench 1579003
2025-04-26 22:23:26 +02:00
AliceRoselia and Disservin
2af64d581b
Update AUTHORS
...
closes https://github.com/official-stockfish/Stockfish/pull/5972
No functional change
2025-04-18 14:32:19 +02:00
Daniel Samek and Disservin
15f34560f2
Update AUTHORS
...
closes https://github.com/official-stockfish/Stockfish/pull/5964
No functional change
2025-04-18 14:32:13 +02:00
Daniel Samek and Disservin
d942e13398
Less fail high cnt in the condition
...
Passed STC:
https://tests.stockfishchess.org/tests/view/67e027538888403457d87535
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 164000 W: 42535 L: 42034 D: 79431
Ptnml(0-2): 478, 19228, 42113, 19677, 504
Passed LTC:
https://tests.stockfishchess.org/tests/view/67e3c21b8888403457d87808
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 139176 W: 35500 L: 34975 D: 68701
Ptnml(0-2): 54, 15038, 38898, 15525, 73
closes https://github.com/official-stockfish/Stockfish/pull/5960
Bench: 1921404
2025-04-02 17:52:38 +02:00
Kenneth Lee and Disservin
9f0844c101
Simplify extensions depth increase condition
...
Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 42784 W: 11198 L: 10979 D: 20607
Ptnml(0-2): 166, 5024, 10822, 5185, 195
https://tests.stockfishchess.org/tests/view/6795b6f8f6281b7d7b1869d6
Failed LTC:
LLR: -2.95 (-2.94,2.94) <-1.75,0.25>
Total: 283614 W: 72046 L: 72587 D: 138981
Ptnml(0-2): 241, 32097, 77647, 31606, 216
https://tests.stockfishchess.org/tests/view/6795cbb6f6281b7d7b186a07
Passed VLTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 59678 W: 15387 L: 15211 D: 29080
Ptnml(0-2): 23, 6169, 17273, 6357, 17
https://tests.stockfishchess.org/tests/view/6795c6dbf6281b7d7b1869f9
closes https://github.com/official-stockfish/Stockfish/pull/5827
Bench: 3088494
2025-02-02 13:52:16 +01:00
pkrisz99 and Joost VandeVondele
75b75bc16a
Add improving to a condition of NMP
...
This patch makes one of the conditions for null-move pruning depend on whether we're improving. Keep in mind that it relies on the "classical" definiton, rather than the refined one.
Passed STC: https://tests.stockfishchess.org/tests/view/678d5267d63764e34db49720
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 38976 W: 10296 L: 9974 D: 18706
Ptnml(0-2): 135, 4504, 9902, 4798, 149
Passed LTC: https://tests.stockfishchess.org/tests/view/678d5891d63764e34db49731
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 275772 W: 70655 L: 69836 D: 135281
Ptnml(0-2): 217, 30615, 75394, 31452, 208
closes https://github.com/official-stockfish/Stockfish/pull/5813
Bench: 2475787
2025-01-25 20:41:37 +01:00
sscg13 and Disservin
7858f9dfdc
Use same pawn value in both nets when doing material scaling of eval
...
Passed Non-regression STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 221312 W: 57291 L: 57274 D: 106747
Ptnml(0-2): 760, 26152, 56841, 26117, 786
https://tests.stockfishchess.org/tests/view/676e2a101a2f267f20548453
Passed Non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 176808 W: 45084 L: 45023 D: 86701
Ptnml(0-2): 112, 19418, 49286, 19473, 115
https://tests.stockfishchess.org/tests/view/676f424d1a2f267f2054857f
closes https://github.com/official-stockfish/Stockfish/pull/5741
Bench: 1121800
2025-01-12 21:09:58 +01:00
Carlos Esparza and Disservin
1f9404434d
Simplify picking of evasion moves
...
Sort evasions before we start returning them in next_move() (just like
every other kind of move) instead of looking for the biggest element on
every call to next_move(). The bench number changes because the old
method is not equivalent to a stable sort.
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 132064 W: 34318 L: 34204 D: 63542
Ptnml(0-2): 392, 15522, 34106, 15604, 408
https://tests.stockfishchess.org/tests/view/6743fee086d5ee47d953f9ca
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 97542 W: 24899 L: 24757 D: 47886
Ptnml(0-2): 63, 10646, 27193, 10824, 45
https://tests.stockfishchess.org/tests/view/674509cd86d5ee47d953fb96
closes https://github.com/official-stockfish/Stockfish/pull/5700
Bench: 1094825
2024-12-08 19:54:18 +01:00
Mathias Parnaudeau and Disservin
d4358ddba7
Add autodetection of ppc64 architectures
...
That allows 'make -j profile-build' work on ppc64 architectures, setting the use of
the appropriate SIMD extension, Altivec or VSX.
For VSX, gcc allows to map SSE2 intrinsics and get benefit of the existing SIMD code.
On PowerMac G5, using altivec provides a performance improvement of 30%.
On Talos 2, using vsx provides a performance improvement of 120%.
closes https://github.com/official-stockfish/Stockfish/pull/5624
No functional change
2024-10-12 16:30:44 +02:00
Ömer Faruk Tutkun and Disservin
6592b13d56
Introduce Continuation Correction History
...
Continuation correction history uses last 2 move to correct static eval.
ContCorrHist first introduced by @martinnovaak in
Motor(https://github.com/martinnovaak/motor/pull/162 ). Earlier ideas
using last move to correct eval is introduced by @MinusKelvin in
Ice4(https://github.com/MinusKelvin/ice4/commit/45daf7d9ea64ea4efaf0d2b4e99f53e12e08c838 )
Passed STC:
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 310144 W: 81267 L: 80538 D: 148339
Ptnml(0-2): 1160, 36607, 78834, 37286, 1185
https://tests.stockfishchess.org/tests/view/66f96cbc86d5ee47d953b7f7
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 97470 W: 24892 L: 24447 D: 48131
Ptnml(0-2): 63, 10631, 26915, 11050, 76
https://tests.stockfishchess.org/tests/view/66fd59bc86d5ee47d953b9ea
closes https://github.com/official-stockfish/Stockfish/pull/5617
Bench: 1143382
2024-10-12 16:30:44 +02:00
Wencey Wang and Joost VandeVondele
93869d5d0a
Fix native arch builds on loongarch64
...
Adds support for LSX and LASX
closes https://github.com/official-stockfish/Stockfish/pull/5600
No functional change
2024-09-28 17:12:12 +02:00
Nonlinear2 and Joost VandeVondele
6cf7f300ac
Simplify stand pat adjustement
...
Remove && !PvNode condition for stand pat adjustement in quiescence search.
Passed non-regression STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 108544 W: 28228 L: 28085 D: 52231
Ptnml(0-2): 389, 12902, 27554, 13031, 396
https://tests.stockfishchess.org/tests/view/66bb402e4ff211be9d4ee688
Passed non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 193014 W: 48796 L: 48751 D: 95467
Ptnml(0-2): 188, 21481, 53116, 21542, 180
https://tests.stockfishchess.org/tests/view/66bc78774ff211be9d4ee88f
closes https://github.com/official-stockfish/Stockfish/pull/5538
Bench 1787360
2024-08-20 21:31:33 +02:00
Andyson007 and Joost VandeVondele
42aae5fe8b
Fixed non UCI compliance
...
print `<empty>` and accept `<empty>` for UCI string options,
accepting empty strings as well. Internally use empty strings (`""`).
closes https://github.com/official-stockfish/Stockfish/pull/5474
No functional change
2024-07-15 13:14:57 +02:00
yl25946 and Joost VandeVondele
362a77a345
Move Loop Consistency in Probcut
...
In probcut move loop, everything is enclosed within a large if statement. I've
changed it to guard clauses to stay consistent with other move loops.
closes https://github.com/official-stockfish/Stockfish/pull/5463
No functional change
2024-07-09 18:54:12 +02:00
evqsx and Disservin
4151c06b74
Remove the correction history bonus in null move search
...
Passed STC:
https://tests.stockfishchess.org/tests/view/666168e191e372763104c664
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 94848 W: 24708 L: 24550 D: 45590
Ptnml(0-2): 289, 11355, 24033, 11403, 344
Passed LTC:
https://tests.stockfishchess.org/tests/view/6661e73591e372763104c751
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 70452 W: 17849 L: 17679 D: 34924
Ptnml(0-2): 27, 7707, 19596, 7861, 35
closes https://github.com/official-stockfish/Stockfish/pull/5375
Bench: 1174094
2024-06-08 23:39:46 +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
Ciekce and Disservin
eb20de36c0
Avoid unnecessary creation of accumulator cache
...
Saves a (currently) 800 KB allocation and deallocation when running
`eval`, not particularly significant and zero impact on play but not
necessary either.
closes https://github.com/official-stockfish/Stockfish/pull/5201
No functional change
2024-05-01 14:10:57 +02:00
Shawn Xu and Joost VandeVondele
e13e4cfb83
Simplify NMP Condition
...
Remove eval >= ss->staticEval condition for Null Move Pruning.
Passed non-regression STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 44000 W: 11420 L: 11202 D: 21378
Ptnml(0-2): 174, 5243, 10978, 5401, 204
https://tests.stockfishchess.org/tests/live_elo/6603ee490ec64f0526c57984
Passed non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 82956 W: 20978 L: 20818 D: 41160
Ptnml(0-2): 54, 9353, 22499, 9523, 49
https://tests.stockfishchess.org/tests/live_elo/660464b50ec64f0526c5804d
closes https://github.com/official-stockfish/Stockfish/pull/5142
Bench 1759189
2024-03-29 10:18:40 +01:00
Tierynn Byrnes and Disservin
f4f0b32d55
Refactor timeman.cpp
...
Move optExtra, optConstant and maxConstant into lower scope.
closes https://github.com/official-stockfish/Stockfish/pull/5052
No functional change
2024-02-14 21:38:17 +01:00
gahtan-syarif and Disservin
15093d43c4
Simplify opponent movecount reduction
...
This removes the reduction decrease that occured
when the previous ply had a movecount greater than
7.
Passed STC:
https://tests.stockfishchess.org/tests/view/65c3f6dac865510db0283ef6
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 11968 W: 3205 L: 2953 D: 5810
Ptnml(0-2): 38, 1310, 3064, 1506, 66
Passed LTC:
https://tests.stockfishchess.org/tests/view/65c42377c865510db0284217
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 35676 W: 9113 L: 8905 D: 17658
Ptnml(0-2): 22, 3893, 9802, 4097, 24
closes https://github.com/official-stockfish/Stockfish/pull/5040
Bench: 1148379
2024-02-09 19:06:25 +01:00
Ahmed Kerimov and Disservin
c17ec9524d
Move OnChange callback in Option ctors
...
Parameter 'f' is passed by value and only copied once. Moving it to
avoid unnecessary copies.
closes https://github.com/official-stockfish/Stockfish/pull/5014
No functional change
2024-01-26 21:00:41 +01:00
rn5f107s2 and Disservin
e860f620aa
Reduce futility_margin further when improving
...
The idea of this is to unroll the futility_margin calculation to allow
for the improving flag to have a greater effect on the futility margin.
The current factor is 1.5 instead of the previous 1 resulting in a
deduction of an extra margin/2 from futilit_margin if improving. The
chosen value was not tuned, meaning that there is room for tweaking it.
This patch is partially inspired by @Vizvezdenec, who, although quite
different in execution, tested another idea where the futility_margin is
lowered further when improving [1].
[1]: (first take) https://tests.stockfishchess.org/tests/view/65a56b1879aa8af82b97164b
Passed STC:
https://tests.stockfishchess.org/tests/live_elo/65a8bfc179aa8af82b974e3c
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 161152 W: 41321 L: 40816 D: 79015
Ptnml(0-2): 559, 19030, 40921, 19479, 587
Passed rebased LTC:
https://tests.stockfishchess.org/tests/live_elo/65a8b9ef79aa8af82b974dc0
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 96024 W: 24172 L: 23728 D: 48124
Ptnml(0-2): 56, 10598, 26275, 11012, 71
closes https://github.com/official-stockfish/Stockfish/pull/5000
Bench: 1281703
2024-01-21 12:42:07 +01:00
Tobias Steinmann and Disservin
4f99dfcae2
Update Makefile for android x86-64 builds
...
For developing an Android GUI it can be helpful to use the Emulator on Windows.
Therefor an android_x86-64 library of Stockfish is needed. It would be nice to
compile it "out-of-the-box".
This change is originally suggested by Craftyawesome
closes https://github.com/official-stockfish/Stockfish/pull/4927
No functional change
2023-12-31 19:51:04 +01:00
