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Stockfish 2023110416 NNUE for Windows and Linux, compiled by Stefan Geschwentner (Elo +1.96)

on


Stockfish 2023110416 - UCI chess engine, compiled by Stefan Geschwentner

Timestamp: 1699342123
Double weight of pawn history for quiet move ordering.

I measured on my 1000 position bench the average additional added pawn history per depth.
This shows on average negative value with even smaller values with increaing depth.

A linear regression against depth get following formula:
-1960 - 130 * depth

For compensation add this to the used sort limit to maintain roughly the same proportion of sorted quiet moves.

Remarks:
1. using no compensation failed here https://tests.stockfishchess.org/tests/view/6547664f136acbc5735265f0
2. using only the compensation failed at LTC:
passed STC: https://tests.stockfishchess.org/tests/view/65477457136acbc5735266f8
failed LTC: https://tests.stockfishchess.org/tests/view/65487fc8136acbc573527d1c

STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 98528 W: 25109 L: 24699 D: 48720 Elo +1.45
Ptnml(0-2): 334, 11586, 25009, 12006, 329
https://tests.stockfishchess.org/tests/view/65475873136acbc5735264f7

LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 69726 W: 17467 L: 17073 D: 35186 Elo +1.96
Ptnml(0-2): 39, 7814, 18769, 8196, 45
https://tests.stockfishchess.org/tests/view/6547e759136acbc573527071

closes https://github.com/official-stockfish/Stockfish/pull/4866
Bench: 1379422

Stockfish rating CEDR progress:
Pl Engine Rating Score Games %
20 Stockfish 20230227 3752.9 92.00 134 68.66
39 Stockfish ba43fcaff995 3745.4 112.50 159 70.75
40 Stockfish 241022 3745.3 64.00 112 57.14
42 Stockfish 031022 3742.8 110.50 158 69.94
54 Stockfish 070922 3740.2 123.00 164 75.00
58 Stockfish 20230911 3739.7 190.00 324 58.64
64 Stockfish 20230325 3739.1 109.00 169 64.50
67 Stockfish 20221107 3739.0 106.50 186 57.26
73 Stockfish 301022 3738.4 112.00 175 64.00
78 Stockfish 20230218 3737.5 110.50 164 67.38
81 Stockfish 20231008 3737.1 144.50 246 58.74
99 Stockfish 20230128 3735.2 69.00 106 65.09
101 Stockfish 20230813 3734.9 164.50 238 69.12
103 Stockfish 20231014 3734.8 146.00 256 57.03
118 Stockfish 20230525 3733.2 71.00 122 58.20
132 Stockfish 20230903 3731.9 308.50 457 67.51
138 Stockfish 20230711 3731.4 80.50 122 65.98
159 Stockfish 161022 3730.4 147.00 240 61.25
160 Stockfish 20221123 3730.4 247.50 356 69.52
165 Stockfish 20230520 3730.2 106.50 174 61.21
187 Stockfish 20221224 3728.8 65.50 104 62.98
198 Stockfish 20231021 3728.2 90.00 126 71.43
206 Stockfish 20230531 3727.9 61.00 116 52.59
220 Stockfish 23092217 3727.2 91.00 113 80.53
223 Stockfish 16 3727.0 1717.00 2877 59.68
232 Stockfish 20230114 3726.4 295.00 410 71.95


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