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

[Homayoun]

[Homayoun]

Author: Gahtan Nahdi
Date: Tue Mar 26 18:17:00 2024 +0100
Timestamp: 1711473420

Remove material imbalance from nnue eval

Passed non-reg STC:
https://tests.stockfishchess.org/tests/ ... 0526c52b57
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 76480 W: 19893 L: 19712 D: 36875 Elo +0.82
Ptnml(0-2): 339, 9107, 19157, 9308, 329

Passed non-reg LTC:
https://tests.stockfishchess.org/tests/ ... 0526c53885
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 150948 W: 38078 L: 37988 D: 74882 Elo +0.21
Ptnml(0-2): 111, 16997, 41148, 17127, 91

closes https://github.com/official-stockfish/S ... /pull/5135

Bench: 2103324

https://abrok.eu/stockfish/

[Homayoun]

Author: Disservin
Date: Fri Mar 29 13:13:07 2024 +0100
Timestamp: 1711714387

Improve prerelease creation workflow

In the last couple of months we sometimes saw duplicated prereleases uploaded to GitHub, possibly due to some racy behavior when concurrent jobs create a prerelease. This now creates an empty prerelease at the beginning of the CI and the binaries are later just attached to this one.

closes https://github.com/official-stockfish/S ... /pull/5144

No functional change

https://abrok.eu/stockfish/

[OrgZ]

Author: Joost VandeVondele
Date: Sat Mar 30 12:38:02 2024 +0100
Timestamp: 1711798682

Avoid a note related to an ABI change

current master triggers a gcc note:
parameter passing for argument of type 'std::pair<double, double>' when C++17 is enabled changed to match C++14 in GCC 10.1

while this is inconsequential, and just informative https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111516 we can easily avoid it.

closes https://github.com/official-stockfish/S ... /pull/5145

No functional change
see source: https://github.com/official-stockfish/S ... 43bf21360e

[Homayoun]

Author: Joost VandeVondele
Date: Sat Mar 30 12:38:02 2024 +0100
Timestamp: 1711798682

Avoid a note related to an ABI change

current master triggers a gcc note:
parameter passing for argument of type 'std::pair<double, double>' when C++17 is enabled changed to match C++14 in GCC 10.1

while this is inconsequential, and just informative https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111516 we can easily avoid it.

closes https://github.com/official-stockfish/S ... /pull/5145

No functional change
see source: https://github.com/official-stockfish/S ... 43bf21360e

Thanks.

[Cr@ck]

Friends, please tell me at what time controls STC and VLTC testing of Stockfish is carried out? It says that VLTC is carried out with control 60+0.6. Is it 60 minutes or 60 seconds per game?