Carlos Esparza
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
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
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(45daf7d9eahttps://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
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
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
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
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
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
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
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
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
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
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
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
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
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
FauziAkram
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
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
WangXiang
cdfafb3426
Add loongarch64 support
...
Adding support for LoongArch64 architecture. Tested on Loongson 3A6000 EVB
Board. Since Loongson's SIMD extended instruction set
([LSX](https://gcc.gnu.org/onlinedocs/gcc/LoongArch-SX-Vector-Intrinsics.html ),
[LASX](https://gcc.gnu.org/onlinedocs/gcc/LoongArch-ASX-Vector-Intrinsics.html ))
is already supported by GCC, more optimizations are being developed.
Here's the benchmark result for Loongson 3A6000 (4c8t, 2.5Ghz) without SIMD
optimizations.
```
Total time (ms) : 17903
Nodes searched : 1244386
Nodes/second : 69507
```
closes https://github.com/official-stockfish/Stockfish/pull/4913
No functional change
2023-12-14 18:41:53 +01:00
Taras Vuk
7a4de96159
Skip futility pruning if ttMove has bad history
...
Passed STC:
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 52416 W: 13465 L: 13128 D: 25823
Ptnml(0-2): 128, 6024, 13604, 6287, 165
https://tests.stockfishchess.org/tests/view/651fadd4ac577114367277bf
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 87348 W: 22234 L: 21818 D: 43296
Ptnml(0-2): 38, 9240, 24698, 9664, 34
https://tests.stockfishchess.org/tests/view/65201932ac57711436728218
closes https://github.com/official-stockfish/Stockfish/pull/4825
bench: 1246560
2023-10-08 07:56:07 +02:00
Jasper Shovelton
ce99b4b2ef
Increment minor section number from 3.7.1 to 3.8.1.
...
Pext has nothing to do with git commit sha/date, so separate the two
sub-sections.
closes https://github.com/official-stockfish/Stockfish/pull/4785
No functional change
2023-09-29 22:07:10 +02:00
Joost VandeVondele
fe7353f702
Update links to fishtest
...
Fishtest has moved to https://github.com/official-stockfish/fishtest/
closes https://github.com/official-stockfish/Stockfish/pull/4758
No functional change
2023-08-22 10:53:49 +02:00
SzilBalazs
3e5a817fd2
Fix dead link to compression algorithm in tbprobe
...
closes https://github.com/official-stockfish/Stockfish/pull/4746
No functional change
2023-08-16 21:24:58 +02:00
Gabrik
84e97a38a3
Remove the unused enum ScaleFactor
...
closes https://github.com/official-stockfish/Stockfish/pull/4740
No functional change
2023-08-13 11:46:48 +02:00
Stephen Touset
027713c4b4
Remove Zobrist::noPawns
...
Zobrist::noPawns is no longer used.
closes https://github.com/official-stockfish/Stockfish/pull/4344
no functional change
2023-07-25 00:13:38 +02:00
Cody Ho
3fe0d5c533
Unused code cleanup
...
closes https://github.com/official-stockfish/Stockfish/pull/4696
No functional change
2023-07-19 21:38:39 +02:00
Robert Nurnberg @ elitebook
6a31f54d3c
remove evalType from bench
...
no longer used
closes https://github.com/official-stockfish/Stockfish/pull/4694
No functional change
2023-07-18 08:09:52 +02:00
rn5f107s2
95ce443aaa
simplified gives check castling
...
tested verifying perft and bench is unchanged
on a larger set of epds for both standard and FRC chess.
Passed non-regression STC:
https://tests.stockfishchess.org/tests/live_elo/648587be65ffe077ca123d78
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 153632 W: 41015 L: 40928 D: 71689
Ptnml(0-2): 377, 16077, 43816, 16174, 372
closes https://github.com/official-stockfish/Stockfish/pull/4628
No functional change
2023-07-03 18:54:22 +02:00
Daniel Monroe
ef94f77f8c
Update default net to nn-a3d1bfca1672.nnue
...
faster permutation of master net weights
Activation data taken from https://drive.google.com/drive/folders/1Ec9YuuRx4N03GPnVPoQOW70eucOKngQe?usp=sharing
Permutation found using 836387a0e5/ftperm.pyhttps://github.com/glinscott/nnue-pytorch/pull/254
The algorithm greedily selects 2- and 3-cycles that can be permuted to increase the number of runs of zeroes. The percent of zero runs from the master net increased from 68.46 to 70.11 from 2-cycles and only increased to 70.32 when considering 3-cycles. Interestingly, allowing both halves of L1 to intermix when creating zero runs can give another 0.5% zero-run density increase with this method.
Measured speedup:
```
CPU: 16 x AMD Ryzen 9 3950X 16-Core Processor
Result of 50 runs
base (./stockfish.master ) = 1561556 +/- 5439
test (./stockfish.patch ) = 1575788 +/- 5427
diff = +14231 +/- 2636
speedup = +0.0091
P(speedup > 0) = 1.0000
```
closes https://github.com/official-stockfish/Stockfish/pull/4640
No functional change
2023-07-01 12:59:28 +02:00
Viren6
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
Andreas Matthies
7922e07af8
Fix for MSVC compilation.
...
MSVC needs two more explicit casts to compile new affine_transform_sparse_input.
See https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_castsi256_ps
and https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm_castsi128_ps
closes https://github.com/official-stockfish/Stockfish/pull/4616
No functional change
2023-06-13 08:45:25 +02:00
AndrovT
38e61663d8
Use block sparse input for the first layer.
...
Use block sparse input for the first fully connected layer on architectures with at least SSSE3.
Depending on the CPU architecture, this yields a speedup of up to 10%, e.g.
```
Result of 100 runs of 'bench 16 1 13 default depth NNUE'
base (...ockfish-base) = 959345 +/- 7477
test (...ckfish-patch) = 1054340 +/- 9640
diff = +94995 +/- 3999
speedup = +0.0990
P(speedup > 0) = 1.0000
CPU: 8 x AMD Ryzen 7 5700U with Radeon Graphics
Hyperthreading: on
```
Passed STC:
https://tests.stockfishchess.org/tests/view/6485aa0965ffe077ca12409c
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 8864 W: 2479 L: 2223 D: 4162
Ptnml(0-2): 13, 829, 2504, 1061, 25
This commit includes a net with reordered weights, to increase the likelihood of block sparse inputs,
but otherwise equivalent to the previous master net (nn-ea57bea57e32.nnue).
Activation data collected with https://github.com/AndrovT/Stockfish/tree/log-activations , running bench 16 1 13 varied_1000.epd depth NNUE on this data. Net parameters permuted with https://gist.github.com/AndrovT/9e3fbaebb7082734dc84d27e02094cb3 .
closes https://github.com/official-stockfish/Stockfish/pull/4612
No functional change
2023-06-12 20:41:27 +02:00
windfishballad
7e9b131efb
Removed quadratic term in optimism
...
Remove term which is quadratic in optimism in the eval.
Simplifies and should also remove the bias towards side to move making the eval better for analysis.
STC: https://tests.stockfishchess.org/tests/view/6470a9d8c29e0d4352b0bca5
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 154432 W: 41127 L: 41040 D: 72265
Ptnml(0-2): 380, 17094, 42190, 17163, 389
LTC: https://tests.stockfishchess.org/tests/view/6471e9b3e549d9cf2fb219ef
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 127926 W: 34474 L: 34369 D: 59083
Ptnml(0-2): 43, 12505, 38776, 12582, 57
closes https://github.com/official-stockfish/Stockfish/pull/4590
Bench: 2541211
2023-05-28 20:05:50 +02:00
cj5716
c701745cf2
Remove ss->ttHit condition where ttValue != VALUE_NONE
...
Simplification is done at 3 separate places in the code.
Thanks to peregrineshahin for helping me find 2 of such places.
(See original PR #4584 )
Passed non-regression test
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 120256 W: 32204 L: 32085 D: 55967
Ptnml(0-2): 292, 12473, 34483, 12584, 296
https://tests.stockfishchess.org/tests/view/646f045968661bfd984325e3
closes https://github.com/official-stockfish/Stockfish/pull/4587
No functional change
2023-05-25 20:49:11 +02:00
Boštjan Mejak
b22a1b10bb
Update AUTHORS
...
Improved some comments in the AUTHORS file, sort contributors
closes https://github.com/official-stockfish/Stockfish/pull/4520
No functional change
2023-04-25 08:08:48 +02:00
pb00067
f0556dcbe3
Small cleanups
...
remove some unneeded assignments, typos, incorrect comments, add authors entry.
closes https://github.com/official-stockfish/Stockfish/pull/4417
no functional change
2023-03-14 08:38:02 +01:00
Maxim Masiutin
70dfa141d5
Clarify the description of the x86-64-vnni256 and x86-64-avxvnni architectures
...
Now it is clearly explained that "x86-64-vnni256" requires full
support of AVX512-VNNI, but only 256-bit operands are used.
closes https://github.com/official-stockfish/Stockfish/pull/4427
No functional change
2023-03-08 07:14:07 +01:00
borg323
e5f6d71b96
Fix build on arm windows
...
avoids the use of _mm_malloc on arm windows.
fixes #4379
closes https://github.com/official-stockfish/Stockfish/pull/4388
No functional change
2023-02-18 13:14:05 +01:00
Jonathan
a2038c1a01
apply if constexpr to additional instances
...
as a form of documentation, and a hint to the compiler.
closes https://github.com/official-stockfish/Stockfish/pull/4345
No functional change
2023-01-22 13:15:46 +01:00
Stefano Di Martino
5a88c5bb9b
Modernize code base a little bit
...
Removed sprintf() which generated a warning, because of security reasons.
Replace NULL with nullptr
Replace typedef with using
Do not inherit from std::vector. Use composition instead.
optimize mutex-unlocking
closes https://github.com/official-stockfish/Stockfish/pull/4327
No functional change
2023-01-09 20:25:13 +01:00
Jake Senne
fcee83810a
Only close file if already open
...
Ensures that the tablebase file is only closed if already open.
Fixes #4268
Closes https://github.com/official-stockfish/Stockfish/pull/4321
No functional change
2023-01-09 20:16:17 +01:00
Muzhen Gaming
64656f8583
Add double bonus for prior countermove fail low
...
Add a double extra bonus for particularly bad fail low cases. Original idea by Yoshie2000.
STC: https://tests.stockfishchess.org/tests/view/63a2f0d86b5bf07ac7fad543
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 146488 W: 38992 L: 38532 D: 68964
Ptnml(0-2): 385, 16036, 39965, 16450, 408
LTC: https://tests.stockfishchess.org/tests/view/63a3eaeb6b5bf07ac7fafdec
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 103992 W: 27853 L: 27423 D: 48716
Ptnml(0-2): 41, 10029, 31435, 10441, 50
closes https://github.com/official-stockfish/Stockfish/pull/4302
Bench: 3801857
2022-12-24 16:01:50 +01:00
PikaCat
726e90ccfa
Badge link fix
...
Fix the badge link issue mentioned in https://github.com/badges/shields/issues/8671
closes https://github.com/official-stockfish/Stockfish/pull/4285
No functional change
2022-12-19 18:09:52 +01:00
kurt22i
d09653df0d
Adjust reduction less at medium depths
...
This patch dampens the reduction increase/decrease from statScore at mid-range depths.
Inspired by patterns noticed in this tune: https://tests.stockfishchess.org/tests/view/635188930e5f47a8d0ffe8f5
Passed STC:
https://tests.stockfishchess.org/tests/view/63599dfd6b27ef94d9ec04af
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 87464 W: 23519 L: 23134 D: 40811
Ptnml(0-2): 319, 9599, 23524, 9958, 332
Passed LTC:
https://tests.stockfishchess.org/tests/view/635a73046b27ef94d9ec2313
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 154792 W: 41746 L: 41214 D: 71832
Ptnml(0-2): 79, 15181, 46349, 15703, 84
closes https://github.com/official-stockfish/Stockfish/pull/4213
Bench 4271738
2022-10-30 16:19:09 +01:00
Clausable
8333b2a94c
Fix README typos, update AUTHORS
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closes https://github.com/official-stockfish/Stockfish/pull/4208
No functional change
2022-10-27 08:15:46 +02:00
Clement
5604b255e6
Add RISC-V 64-bit support
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adds a riscv64 target architecture to the Makefile to support RISC-V 64-bit.
Compiled and tested on VisionFive 2 board.
closes https://github.com/official-stockfish/Stockfish/pull/4205
No functional change.
2022-10-23 20:18:08 +02:00
MinetaS
234d2156fd
Apply -flto-partition=one / -flto=full
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This patch fixes a potential bug derived from an incompatibility between LTO and top-level assembly code (INCBIN).
Passed non-regression STC (master e90341fhttps://tests.stockfishchess.org/tests/view/634aacf84bc7650f0755188b
closes https://github.com/official-stockfish/Stockfish/pull/4201
No functional change
2022-10-23 19:58:47 +02:00
Rodrigo Roim
79c5f3a692
Fix tablebase probe for dtz >1000 w/o 50 move rule
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For qn4N1/6R1/3K4/8/B2k4/8/8/8 w - - 0 1, white loses with DTZ 1034.
See https://syzygy-tables.info/?fen=qn4N1/6R1/3K4/8/B2k4/8/8/8_w_-_-_0_1
Prior to this fix, due to a too small hard-coded value, Stockfish interpreted this as winning.
The new value picked (1<<18) is large enough to deal with the largest DTZ values that can be stored in the current syzygy format.
closes https://github.com/official-stockfish/Stockfish/pull/4187
No functional change.
2022-10-16 12:58:48 +02:00
Boštjan Mejak
809849fa27
Wording of help output and comments.
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Improved the output text that is diplayed when executing the 'help' command.
Also, some comments were fixed along the way.
closes https://github.com/official-stockfish/Stockfish/pull/4048
closes https://github.com/official-stockfish/Stockfish/pull/4044
No functional change
2022-06-07 08:30:07 +02:00
xoto10
4c7de9e8ab
Adjust scale param higher
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xoto10's scaleopt tune resulted in a yellow LTC, but the main parameter shift looked almost exactly like the tune rate reduction schedule,
so further increases of that param were tried. Joint work xoto10 and dubslow.
passed LTC:
https://tests.stockfishchess.org/tests/view/628c709372775f382300f03e
LLR: 2.93 (-2.94,2.94) <0.50,3.00>
Total: 70112 W: 18932 L: 18584 D: 32596
Ptnml(0-2): 66, 6904, 20757, 7274, 55
failed STC:
https://tests.stockfishchess.org/tests/view/6290e4441e7cd5f29966bdc8
LLR: -2.96 (-2.94,2.94) <0.00,2.50>
Total: 59976 W: 15919 L: 16018 D: 28039
Ptnml(0-2): 250, 6791, 15974, 6754, 219
similar LTC's were yellow
first yellow LTC: https://tests.stockfishchess.org/tests/view/6288a33f817227d3e5c5b05d
double exaggerate yellow: https://tests.stockfishchess.org/tests/live_elo/628e140372775f38230129a6
triple exaggerate yellow: https://tests.stockfishchess.org/tests/live_elo/628e2caf72775f3823012d45
closes https://github.com/official-stockfish/Stockfish/pull/4036
bench 6410652
2022-05-29 19:14:20 +02:00
