Polyfish is a UCI chess engine based on Stockfish. Rating CEDR=3723
It is identical to Stockfish with the added capability of handling Polyglot,
Polyfish supports two polyglot BIN books at the same time. The second book is only probed if the first book has no moves for the given position. The engine starts searching only if no move is found in either the first book or the second book.
Change log
Fixed CTG bug related to en passant move decoding
Enhanced CTG move selection by ignoring moves with negative weights
Individual statistics: Polyfish 230202 - 312 games (+ 87,=224,- 1), 63.8 %
Critter 1.6a : 8 (+ 7,= 1,- 0), 93.8 %
SugaR AI 2.50 : 1 (+ 1,= 0,- 0), 100.0 %
Komodo 13.02 : 2 (+ 1,= 1,- 0), 75.0 %
RofChade 3.0 : 2 (+ 1,= 1,- 0), 75.0 %
StockfishMZ 170522 : 2 (+ 0,= 2,- 0), 50.0 %
Fisherov chess monk 1.2 : 12 (+ 0,= 12,- 0), 50.0 %
Demolito 2021-10-21 : 2 (+ 2,= 0,- 0), 100.0 %
Revenge 3.0 : 6 (+ 4,= 2,- 0), 83.3 %
Teal Oracle : 1 (+ 1,= 0,- 0), 100.0 %
Nebula-vortex 1.0 : 1 (+ 0,= 1,- 0), 50.0 %
DarkSister 1.9a : 1 (+ 0,= 1,- 0), 50.0 %
Berserk 10 : 2 (+ 1,= 1,- 0), 75.0 %
AI 27.0 : 1 (+ 0,= 1,- 0), 50.0 %
YuliGM PrO 4.0 : 1 (+ 0,= 1,- 0), 50.0 %
Seer 2.6 : 2 (+ 2,= 0,- 0), 100.0 %
Kayra 1.7 : 10 (+ 0,= 10,- 0), 50.0 %
Cool Iris 5.2 : 1 (+ 0,= 1,- 0), 50.0 %
RubiChess 20221203 : 2 (+ 0,= 2,- 0), 50.0 %
Cheese 3.1.1 : 2 (+ 2,= 0,- 0), 100.0 %
Kookaburra 1.03a : 10 (+ 0,= 10,- 0), 50.0 %
Little Goliath 3.16 : 2 (+ 2,= 0,- 0), 100.0 %
Dragon 3.2 : 10 (+ 2,= 8,- 0), 60.0 %
Uralochka 3.39d : 2 (+ 1,= 1,- 0), 75.0 %
Rebel 16.1 : 2 (+ 1,= 1,- 0), 75.0 %
Blue Marlin 15.6 : 11 (+ 1,= 10,- 0), 54.5 %
BrainLearn 21.1 : 10 (+ 0,= 9,- 1), 45.0 %
Koivisto 9.0 : 2 (+ 0,= 2,- 0), 50.0 %
Koivisto 9.0 Ipman : 2 (+ 1,= 1,- 0), 75.0 %
Stockfish 20230125 : 6 (+ 0,= 6,- 0), 50.0 %
Corchess 230125 : 2 (+ 0,= 2,- 0), 50.0 %
Viridithas 7.0.0 : 7 (+ 6,= 1,- 0), 92.9 %
Protej 0.6.4 : 6 (+ 6,= 0,- 0), 100.0 %
BlackCore 5.1 : 6 (+ 5,= 1,- 0), 91.7 %
Vafra 12.3 Cfish : 6 (+ 2,= 4,- 0), 66.7 %
CorChess 20230125 : 4 (+ 0,= 4,- 0), 50.0 %
Winter 2.0 : 6 (+ 6,= 0,- 0), 100.0 %
Eman 8.70 : 17 (+ 0,= 17,- 0), 50.0 %
Igel 3.4.0 : 8 (+ 2,= 6,- 0), 62.5 %
Stockfish 20230202 : 4 (+ 0,= 4,- 0), 50.0 %
ShashChess 28 : 16 (+ 0,= 16,- 0), 50.0 %
Smallbrain 7.0 : 6 (+ 2,= 4,- 0), 66.7 %
Charisma Light 2 : 6 (+ 0,= 6,- 0), 50.0 %
RukChess 3.0.15 NNUE2 : 2 (+ 2,= 0,- 0), 100.0 %
Stockfish 230202 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 230125 Ivec : 2 (+ 0,= 2,- 0), 50.0 %
Bagatur 3.7 : 2 (+ 2,= 0,- 0), 100.0 %
Mess 0.1.0 : 2 (+ 2,= 0,- 0), 100.0 %
Koivisto 9.2 hotfix : 2 (+ 1,= 1,- 0), 75.0 %
CorChess 20230210 : 4 (+ 0,= 4,- 0), 50.0 %
Caissa 1.6 : 2 (+ 2,= 0,- 0), 100.0 %
Predator X5 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 20230203 : 2 (+ 0,= 2,- 0), 50.0 %
Velvet 5.1.0 : 2 (+ 2,= 0,- 0), 100.0 %
Fat Fritz 2 : 10 (+ 3,= 7,- 0), 65.0 %
Patzer AI 020223 : 4 (+ 0,= 4,- 0), 50.0 %
Berserk 11 : 2 (+ 0,= 2,- 0), 50.0 %
Clover 3.3.1 : 2 (+ 2,= 0,- 0), 100.0 %
Caissa 1.6.3 : 2 (+ 2,= 0,- 0), 100.0 %
Rebel 16.2 : 10 (+ 2,= 8,- 0), 60.0 %
Stockfish 20230218 : 6 (+ 0,= 6,- 0), 50.0 %
Berserk 11.1 : 8 (+ 3,= 5,- 0), 68.8 %
Koivisto 9.2 : 10 (+ 3,= 7,- 0), 65.0 %
Charisma Blitz : 2 (+ 0,= 2,- 0), 50.0 %
Ethereal 14.00 NNUE : 10 (+ 1,= 9,- 0), 55.0 %
Charisma 250223 : 8 (+ 1,= 7,- 0), 56.2 %
CorChess 20230226 : 4 (+ 0,= 4,- 0), 50.0 %
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