Chess engine: Motor 0.4.0

Motor - UCI chess engine written in C++ 17 with (768 -> 32) x 2 -> 1 NNUE trained with

Currently requires Clang or GCC/MinGW compiler.

Rating Chess Engines Diary CEDR=2786

v.0.4.0:

New network size: (768 -> 512) x 2 -> 1

SCRelu activation function

Custom AVX2 simd

SEE pruning

Singular extension + Double extensions

Soft-tm

STC:

Score of motor 0.4.0 vs motor 0.3.0: 1880 - 367 - 1653 [0.694] 3900

... motor 0.4.0 playing White: 1424 - 48 - 479 [0.853] 1951

... motor 0.4.0 playing Black: 456 - 319 - 1174 [0.535] 1949

... White vs Black: 1743 - 504 - 1653 [0.659] 3900

Elo difference: 142.2 +/- 8.4, LOS: 100.0 %, DrawRatio: 42.4 %

LTC:

Score of motor 0.4.0 vs motor 0.3.0: 525 - 93 - 532 [0.688] 1150

... motor 0.4.0 playing White: 412 - 10 - 153 [0.850] 575

... motor 0.4.0 playing Black: 113 - 83 - 379 [0.526] 575

... White vs Black: 495 - 123 - 532 [0.662] 1150

Elo difference: 137.2 +/- 14.7, LOS: 100.0 %, DrawRatio: 46.3 %

Use the AVX2 version if possible.

Chess Engines Diary