Stockfish

[Cengiz-Baba]

Hi Homayoun,

It's a very reasonable request. I will try. I owe my thanks.

Kind regards.
fringe

[Homayoun]

Hi Homayoun,

It's a very reasonable request. I will try. I owe my thanks.

Kind regards.
fringe

Best regards

[Homayoun]

Author: Gahtan Nahdi
Date: Mon Mar 11 10:08:40 2024 +0100
Timestamp: 1710148120

Simplify opponentWorsening condition

Passed non-reg STC:
https://tests.stockfishchess.org/tests/ ... 0526c4033a
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 226624 W: 58601 L: 58589 D: 109434 Elo +0.02
Ptnml(0-2): 1030, 27193, 56819, 27275, 995

Passed non-reg LTC:
https://tests.stockfishchess.org/tests/ ... 0526c4161a
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 243882 W: 61462 L: 61469 D: 120951 Elo -0.01
Ptnml(0-2): 197, 27559, 66419, 27586, 180

closes https://github.com/official-stockfish/S ... /pull/5102

Bench: 1601012

https://abrok.eu/stockfish/

[Homayoun]

Author: Disservin
Date: Tue Mar 12 19:09:50 2024 +0100
Timestamp: 1710266990

Fix Raspberry Pi Compilation

Reported by @Torom over discord.

> dev build fails on Raspberry Pi 5 with clang

```
clang++ -o stockfish benchmark.o bitboard.o evaluate.o main.o misc.o movegen.o movepick.o position.o search.o thread.o timeman.o tt.o uci.o ucioption.o tune.o tbprobe.o nnue_misc.o half_ka_v2_hm.o network.o -fprofile-instr-generate -latomic -lpthread -Wall -Wcast-qual -fno-exceptions -std=c++17 -fprofile-instr-generate -pedantic -Wextra -Wshadow -Wmissing-prototypes -Wconditional-uninitialized -DUSE_PTHREADS -DNDEBUG -O3 -funroll-loops -DIS_64BIT -DUSE_POPCNT -DUSE_NEON=8 -march=armv8.2-a+dotprod -DUSE_NEON_DOTPROD -DGIT_SHA=627974c9 -DGIT_DATE=20240312 -DARCH=armv8-dotprod -flto=full
/tmp/lto-llvm-e9300e.o: in function `_GLOBAL__sub_I_network.cpp':
ld-temp.o:(.text.startup+0x704c): relocation truncated to fit: R_AARCH64_LDST64_ABS_LO12_NC against symbol `gEmbeddedNNUEBigEnd' defined in .rodata section in /tmp/lto-llvm-e9300e.o
/usr/bin/ld: ld-temp.o:(.text.startup+0x704c): warning: one possible cause of this error is that the symbol is being referenced in the indicated code as if it had a larger alignment than was declared where it was defined
ld-temp.o:(.text.startup+0x7068): relocation truncated to fit: R_AARCH64_LDST64_ABS_LO12_NC against symbol `gEmbeddedNNUESmallEnd' defined in .rodata section in /tmp/lto-llvm-e9300e.o
/usr/bin/ld: ld-temp.o:(.text.startup+0x7068): warning: one possible cause of this error is that the symbol is being referenced in the indicated code as if it had a larger alignment than was declared where it was defined
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [Makefile:1051: stockfish] Error 1
make[2]: Leaving directory '/home/torsten/chess/Stockfish_master/src'
make[1]: *** [Makefile:1058: clang-profile-make] Error 2
make[1]: Leaving directory '/home/torsten/chess/Stockfish_master/src'
make: *** [Makefile:886: profile-build] Error 2
```

closes https://github.com/official-stockfish/S ... /pull/5106

No functional change
https://abrok.eu/stockfish/?

[Homayoun]

Author: Disservin
Date: Thu Mar 14 22:14:11 2024 +0100
Timestamp: 1710450851

Fix false positives from ThreadSanitizer

Since Linux Kernel 6.5 we are getting false positives from the ci,
lower the ALSR entropy to disable ALSR, which works as a temporary
workaround.

https://github.com/google/sanitizers/issues/1716
https://bugs.launchpad.net/ubuntu/+sour ... ug/2056762

closes https://github.com/official-stockfish/S ... /pull/5115

No functional change

https://abrok.eu/stockfish/?

[Homayoun]

Author: Disservin
Date: Wed Mar 20 16:36:18 2024 +0100
Timestamp: 1710948978

Add cmath header to movepick.h

No functional change

https://abrok.eu/stockfish/

[OrgZ]

[Homayoun]

[Homayoun]

Note
New update: Friday 22,March. By Muzhen Gaming .Because this update has more than 5 URLs I couldn't share it. According to forum limits.
https://abrok.eu/stockfish/

[OrgZ]

Thanks dear Homayoun


Author: Muzhen Gaming
Date: Fri Mar 22 16:44:06 2024 +0100
Timestamp: 1711122246

VVLTC search tune

This set of parameters was derived from 3 tuning attempts:

tests.stockfishchess.org/tests/view/65d19ab61d8e83c78bfd8436 (80+0.8 x8, ~40k games)
Then tuned with one of linrock's early L1-3072 nets:
tests.stockfishchess.org/tests/view/65def7b04b19edc854ebdec8 (VVLTC, ~36k games)
Starting from the result of this tuning, the parameters were then tuned with the current master net:
tests.stockfishchess.org/tests/view/65f11c420ec64f0526c46fc4 (VVLTC, ~45k games)

Additionally, at the start of the third tuning phase, 2 parameters were manually changed:

Notably, the triple extension margin was decreased from 78 to 22. This idea was given by Vizvezdenec:
https://tests.stockfishchess.org/tests/ ... 0526c46752.
The PvNode extension margin was also adjusted from 50 to 40.

This tune also differs from previous tuning attempts by tuning the evaluation thresholds for smallnet and psqt-only.
The former was increased through the tuning, and this is hypothesized to scale better at VVLTC,
although there is not much evidence of it.

Passed VVLTC 1st sprt: tests.stockfishchess.org/tests/view/65f6761d0ec64f0526c4be88
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 44688 W: 11421 L: 11140 D: 22127 Elo +2.18
Ptnml(0-2): 1, 4170, 13722, 4449, 2

Passed VVLTC 2nd sprt: tests.stockfishchess.org/tests/view/65fa31a30ec64f0526c4f611
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 27450 W: 7057 L: 6778 D: 13615 Elo +3.53
Ptnml(0-2): 4, 2545, 8346, 2828, 2

STC Elo estimate: https://tests.stockfishchess.org/tests/ ... 0526c521ae
Elo: -7.84 ± 1.8 (95%) LOS: 0.0%
Total: 40000 W: 9899 L: 10802 D: 19299 Elo -7.84
Ptnml(0-2): 203, 5221, 10025, 4378, 173
nElo: -14.91 ± 3.4 (95%) PairsRatio: 0.84

closes https://github.com/official-stockfish/S ... /pull/5130

Bench: 1876107
see source: https://github.com/official-stockfish/S ... f7c29444d4