OpenChess

We had three updates on Wed,15Nov and on Thu 16Nov. Because they didn't show considerable Elo progress, I don't share the details.

https://abrok.eu/stockfish/

Author: FauziAkram
Date: Mon Nov 20 19:00:47 2023 +0100
Timestamp: 1700503247

Remove doEvenDeeperSearch

Passed STC:
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 51040 W: 13014 L: 12804 D: 25222 Elo +1.43
Ptnml(0-2): 166, 6032, 12917, 6236, 169
https://tests.stockfishchess.org/tests/ ... c573534801

Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 165168 W: 40863 L: 40789 D: 83516 Elo +0.16
Ptnml(0-2): 73, 18783, 44792, 18869, 67
https://tests.stockfishchess.org/tests/ ... c573535c84

closes https://github.com/official-stockfish/S ... /pull/4880
Bench: 1477007
https://abrok.eu/stockfish/

Author: FauziAkram
Date: Mon Nov 20 19:10:38 2023 +0100
Timestamp: 1700503838

Reformat some comments

Tests used to derive some Elo worth comments:

https://tests.stockfishchess.org/tests/ ... e83956263a
https://tests.stockfishchess.org/tests/ ... c573534711
https://tests.stockfishchess.org/tests/ ... c5735347b9
https://tests.stockfishchess.org/tests/ ... c573534801

closes https://github.com/official-stockfish/S ... /pull/4879

No functional change

Author: lonfom169
Date: Sat Dec 2 11:46:44 2023 +0100
Timestamp: 1701514004

Tweak return value in futility pruning

In futility pruning, return the average between eval and beta.

Passed STC:
https://tests.stockfishchess.org/tests/ ... c5735521d7
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 15200 W: 3926 L: 3642 D: 7632 Elo +6.49
Ptnml(0-2): 36, 1699, 3867, 1941, 57

Passed LTC:
https://tests.stockfishchess.org/tests/ ... c573552304
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 200376 W: 49700 L: 49036 D: 101640 Elo +1.15
Ptnml(0-2): 110, 22584, 54137, 23246, 111

closes https://github.com/official-stockfish/S ... /pull/4897

Bench: 1403703
https://abrok.eu/stockfish/
Note: today we had 8 releases. this one is the latest one.

OrgZ wrote: Sat Dec 02, 2023 7:29 pm

Author: FauziAkram
Date: Mon Dec 4 11:33:58 2023 +0100
Timestamp: 1701686038

Remove cutNode condition

cutNode condition seems to be irrelevant.

Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 24224 W: 6206 L: 5970 D: 12048 Elo +3.38
Ptnml(0-2): 69, 2818, 6122, 3014, 89
https://tests.stockfishchess.org/tests/ ... c5735529ec

Passed LTC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 236538 W: 58624 L: 58622 D: 119292 Elo +0.00
Ptnml(0-2): 136, 26955, 64091, 26945, 142
https://tests.stockfishchess.org/tests/ ... c573552d8f

closes https://github.com/official-stockfish/S ... /pull/4901

Bench: 1244386

https://abrok.eu/stockfish/

Author: Muzhen Gaming
Date: Sun Dec 10 23:23:28 2023 +0100
Timestamp: 1702247008

VLTC Search parameters tune

The SPSA tuning was done for 44k games at 120+1.2.
https://tests.stockfishchess.org/tests/ ... 5f69c7767f.

Note that the tune was originally done in combination with the recent dual NNUE
idea (see #4910).

VLTC:
https://tests.stockfishchess.org/tests/ ... 261f12246e
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 52806 W: 13069 L: 12760 D: 26977 Elo +2.03
Ptnml(0-2): 19, 5498, 15056, 5815, 15

VLTC SMP:
https://tests.stockfishchess.org/tests/ ... 261f1239ba
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 27630 W: 6934 L: 6651 D: 14045 Elo +3.56
Ptnml(0-2): 1, 2643, 8243, 2928, 0

Estimated close to neutral at LTC:
https://tests.stockfishchess.org/tests/ ... 76cf7d9423
Elo: -0.59 ± 1.8 (95%) LOS: 26.6%
Total: 32060 W: 7859 L: 7913 D: 16288 Elo -0.59
Ptnml(0-2): 20, 3679, 8676, 3645, 10
nElo: -1.21 ± 3.8 (95%) PairsRatio: 0.99

closes https://github.com/official-stockfish/S ... /pull/4912

Bench: 128332

OrgZ wrote: Tue Dec 12, 2023 4:41 pm

+1