Rating CEDR=3718 (01.05.2023)
ShashChess is a free UCI chess engine derived from Stockfish family chess engines.
v.32:
Added book management section (thanks to Khalid Omar PolyFish: see the Readme)
Restored Minimum thinking time uci option
Stockfish patch May 7,2023:
Refine deeper post-lmr searches
This patch improves logic conditions for performing deeper searches after passed LMR.
Instead of exceeding alpha by some margin now it requires to exceed the
current best value - which may be lower than alpha (but never bigger since we
update alpha with bestvalue if it exceeds alpha).
Individual statistics: ShashChess 28 - 504 games (+133,=365,- 6), 62.6 %
Critter 1.6a : 6 (+ 5,= 1,- 0), 91.7 %
Komodo 13.02 : 2 (+ 2,= 0,- 0), 100.0 %
RofChade 3.0 : 8 (+ 3,= 5,- 0), 68.8 %
SlowChess 2.9 : 8 (+ 2,= 6,- 0), 62.5 %
Fisherov chess monk 1.2 : 22 (+ 1,= 19,- 2), 47.7 %
Demolito 2021-10-21 : 2 (+ 2,= 0,- 0), 100.0 %
Revenge 3.0 : 14 (+ 2,= 12,- 0), 57.1 %
Booot 7.0 : 2 (+ 2,= 0,- 0), 100.0 %
Seer 2.6 : 8 (+ 5,= 3,- 0), 81.2 %
Kayra 1.7 : 18 (+ 0,= 18,- 0), 50.0 %
Berserk 20221129 : 2 (+ 1,= 1,- 0), 75.0 %
Stockfish 15.1 : 18 (+ 0,= 18,- 0), 50.0 %
RubiChess 20221203 : 8 (+ 3,= 5,- 0), 68.8 %
Cheese 3.1.1 : 2 (+ 2,= 0,- 0), 100.0 %
Kookaburra 1.03a : 18 (+ 0,= 18,- 0), 50.0 %
Little Goliath 3.16 : 2 (+ 2,= 0,- 0), 100.0 %
Dragon 3.2 : 20 (+ 1,= 19,- 0), 52.5 %
Velvet 5.0.0 : 4 (+ 3,= 1,- 0), 87.5 %
Minic 3.33 : 4 (+ 2,= 2,- 0), 75.0 %
Uralochka 3.39d : 10 (+ 7,= 3,- 0), 85.0 %
Rebel 16.1 : 6 (+ 4,= 2,- 0), 83.3 %
Eman 8.60 : 4 (+ 0,= 4,- 0), 50.0 %
Blue Marlin 15.6 : 18 (+ 0,= 18,- 0), 50.0 %
BrainLearn 21.1 : 18 (+ 2,= 16,- 0), 55.6 %
Koivisto 9.0 : 4 (+ 2,= 2,- 0), 75.0 %
Polyfish 230115 : 4 (+ 0,= 4,- 0), 50.0 %
Caissa 1.5 : 4 (+ 2,= 2,- 0), 75.0 %
Koivisto 9.0 Ipman : 2 (+ 1,= 1,- 0), 75.0 %
Stockfish 20230125 : 8 (+ 0,= 8,- 0), 50.0 %
Corchess 230125 : 2 (+ 0,= 2,- 0), 50.0 %
Viridithas 7.0.0 : 14 (+ 11,= 3,- 0), 89.3 %
Protej 0.6.4 : 6 (+ 6,= 0,- 0), 100.0 %
BlackCore 5.1 : 6 (+ 3,= 3,- 0), 75.0 %
Vafra 12.3 Cfish : 10 (+ 3,= 7,- 0), 65.0 %
CorChess 20230125 : 6 (+ 0,= 6,- 0), 50.0 %
Winter 2.0 : 6 (+ 5,= 1,- 0), 91.7 %
Eman 8.70 : 20 (+ 0,= 20,- 0), 50.0 %
Igel 3.4.0 : 14 (+ 8,= 6,- 0), 78.6 %
Stockfish 20230202 : 4 (+ 0,= 4,- 0), 50.0 %
Polyfish 230202 : 18 (+ 0,= 17,- 1), 47.2 %
Smallbrain 7.0 : 6 (+ 5,= 1,- 0), 91.7 %
Charisma Light 2 : 6 (+ 0,= 5,- 1), 41.7 %
Stockfish 230202 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 230125 Ivec : 2 (+ 0,= 2,- 0), 50.0 %
CorChess 20230210 : 4 (+ 0,= 4,- 0), 50.0 %
Caissa 1.6 : 2 (+ 2,= 0,- 0), 100.0 %
Velvet 5.1.0 : 4 (+ 4,= 0,- 0), 100.0 %
Fat Fritz 2 : 12 (+ 2,= 10,- 0), 58.3 %
Patzer AI 020223 : 8 (+ 1,= 7,- 0), 56.2 %
Berserk 11 : 2 (+ 1,= 1,- 0), 75.0 %
Clover 3.3.1 : 2 (+ 2,= 0,- 0), 100.0 %
Caissa 1.6.3 : 4 (+ 3,= 1,- 0), 87.5 %
Rebel 16.2 : 14 (+ 5,= 9,- 0), 67.9 %
Stockfish 20230218 : 6 (+ 0,= 5,- 1), 41.7 %
Berserk 11.1 : 12 (+ 1,= 11,- 0), 54.2 %
Stockfish 20230224 : 2 (+ 0,= 2,- 0), 50.0 %
Koivisto 9.2 : 14 (+ 6,= 8,- 0), 71.4 %
Charisma Light 1.0 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 20230128 : 4 (+ 0,= 4,- 0), 50.0 %
CorChess 20230202 : 2 (+ 0,= 2,- 0), 50.0 %
Charisma Blitz : 4 (+ 0,= 4,- 0), 50.0 %
Ethereal 14.00 NNUE : 14 (+ 8,= 6,- 0), 78.6 %
Stockfish 20230209 : 2 (+ 0,= 1,- 1), 25.0 %
Berserk 20230130b : 2 (+ 0,= 2,- 0), 50.0 %
Charisma 250223 : 10 (+ 1,= 9,- 0), 55.0 %
CorChess 20230226 : 6 (+ 0,= 6,- 0), 50.0 %
Stockfish 20230227 : 2 (+ 0,= 2,- 0), 50.0 %
Leptir 280223 : 2 (+ 0,= 2,- 0), 50.0 %
github:https://github.com/amchess/ShashChess/releases/tag/32
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