Stockfish

[Homayoun]

+1

Many thanks, dear friends, Mr. Sedat and OrgZ for your interest and support.
Best regards

[Homayoun]

Author: Muzhen Gaming
Date: Thu Dec 14 18:50:51 2023 +0100
Timestamp: 1702576251

Remove UCI_AnalyseMode Option

Simplify away the useless option, as documented: "An option handled by your GUI.
This currently doesn't do anything."

The option was originally added with the introduction of contempt
(https://github.com/official-stockfish/S ... 5f82f0e946),
but it is now no longer used.

closes https://github.com/official-stockfish/S ... /pull/4918

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

[Homayoun]

Author: Michael Chaly
Date: Tue Dec 19 18:22:10 2023 +0100
Timestamp: 1703006530

Adjust return value in qsearch after fail high

Instead of returning strict fail soft fail high return value between value from
search and beta (somewhat by analogy to futility pruning and probcut).

This seems to be somewhat depth sensitive heuristic which performed much worse
at LTC while performing much better at STC if it is more aggressive, passed
version is the least aggressive one.

Passed STC:
https://tests.stockfishchess.org/tests/ ... cf40ab1475
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 212352 W: 53900 L: 53315 D: 105137 Elo +0.96
Ptnml(0-2): 809, 25236, 53520, 25783, 828

Passed LTC:
https://tests.stockfishchess.org/tests/ ... 2e79120a7c
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 319362 W: 79541 L: 78630 D: 161191 Elo +0.99
Ptnml(0-2): 202, 35839, 86709, 36708, 223

closes https://github.com/official-stockfish/S ... /pull/4928

Bench: 974739

https://abrok.eu/stockfish/

[STUDENT_MASTER]

[Homayoun]

[Homayoun]

Author: FauziAkram
Date: Fri Dec 22 11:51:08 2023 +0100
Timestamp: 1703242268

Tweak quiet move bonus

Improving quiet move bonus by replacing bestvalue and alpha comparison, with
checking the statScore of the previous search step instead.

Inspired by @locutus2

Passed STC:
https://tests.stockfishchess.org/tests/ ... ee25b614e8
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 51296 W: 13121 L: 12774 D: 25401 Elo +2.35
Ptnml(0-2): 225, 5986, 12868, 6355, 214

Passed LTC:
https://tests.stockfishchess.org/tests/ ... ee25b62587
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 82758 W: 20606 L: 20189 D: 41963 Elo +1.75
Ptnml(0-2): 51, 9149, 22555, 9580, 44

closes https://github.com/official-stockfish/S ... /pull/4930

Bench: 1312822
https://abrok.eu/stockfish/

[Sedat Canbaz]

Author: FauziAkram
Date: Fri Dec 22 11:51:08 2023 +0100
Timestamp: 1703242268

Tweak quiet move bonus

Improving quiet move bonus by replacing bestvalue and alpha comparison, with
checking the statScore of the previous search step instead.

Inspired by @locutus2

Passed STC:
https://tests.stockfishchess.org/tests/ ... ee25b614e8
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 51296 W: 13121 L: 12774 D: 25401 Elo +2.35
Ptnml(0-2): 225, 5986, 12868, 6355, 214

Passed LTC:
https://tests.stockfishchess.org/tests/ ... ee25b62587
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 82758 W: 20606 L: 20189 D: 41963 Elo +1.75
Ptnml(0-2): 51, 9149, 22555, 9580, 44

closes https://github.com/official-stockfish/S ... /pull/4930

Bench: 1312822
https://abrok.eu/stockfish/

Thanks a lot

[Homayoun]

Author: FauziAkram
Date: Fri Dec 22 11:51:08 2023 +0100
Timestamp: 1703242268

Tweak quiet move bonus

Improving quiet move bonus by replacing bestvalue and alpha comparison, with
checking the statScore of the previous search step instead.

Inspired by @locutus2

Passed STC:
https://tests.stockfishchess.org/tests/ ... ee25b614e8
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 51296 W: 13121 L: 12774 D: 25401 Elo +2.35
Ptnml(0-2): 225, 5986, 12868, 6355, 214

Passed LTC:
https://tests.stockfishchess.org/tests/ ... ee25b62587
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 82758 W: 20606 L: 20189 D: 41963 Elo +1.75
Ptnml(0-2): 51, 9149, 22555, 9580, 44

closes https://github.com/official-stockfish/S ... /pull/4930

Bench: 1312822
https://abrok.eu/stockfish/

Thanks a lot

Best regards, Mr. Sedat

[OrgZ]

[Homayoun]