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Chess engine: Alexandria 3.0 NNUE


Chess engine: Alexandria 
Author: PGG106  Rating CEDR=3104

v.3.0
Reduce more on non-pv nodes (LMR) by @PGG106 in #29
Singular extension by @PGG106 in #31
use a separate thread to handle uci commands by @PGG106 in #32
don't nmp if current side has only king and panws on the board by @PGG106 in #33
clamp lmr reduction to [0, depth-1] by @PGG106 in #35
Skip bad captures in QSearch based on SEE score by @PGG106 in #36
Remove evaluation pruning by @PGG106 in #37
Cap history score to +-32768 by @PGG106 in #39
History pruning by @PGG106 in #40
Save original static eval and use it in place of search score when appropriate by @PGG106 in #41
stop checking if move exists before returning tt score by @PGG106 in #42
Use a Relative 768->512->1 net by @PGG106 in #43
Add flag to unroll loops to the makefile by @PGG106 in #44
Batch update Nnue in case of moved pieces by @PGG106 in #45
remove countermove heuristic by @PGG106 in #46
Cleanup Code by @PGG106 in #47
Prefetch TT entry before makemove by @PGG106 in #48

Alexandria 3.0 NNUE download

Individual statistics: Alexandria 2.4            : 3225  341 (+161,=122,- 58), 65.1 %

Stockfish 15                  :   2 (+  0,=  0,-  2),  0.0 %
Fisherov 0.98k                :   4 (+  0,=  1,-  3), 12.5 %
Lc0 0.29.0-rc0                :   2 (+  0,=  0,-  2),  0.0 %
Komodo 13.02                  :   2 (+  0,=  1,-  1), 25.0 %
Zahak 10.0                    :   2 (+  0,=  1,-  1), 25.0 %
Stash 33.0                    :   2 (+  1,=  0,-  1), 50.0 %
Slowchess 2.9                 :   2 (+  0,=  1,-  1), 25.0 %
Marvin 6.0.0                  :   2 (+  0,=  1,-  1), 25.0 %
Fisherov chess monk 1.2       :   2 (+  0,=  0,-  2),  0.0 %
Nalwald 16                    :   2 (+  1,=  1,-  0), 75.0 %
RubiChess 20220813            :   2 (+  0,=  1,-  1), 25.0 %
Dumb 1.11                     :   4 (+  4,=  0,-  0), 100.0 %
Roc 2022Aug18                 :   4 (+  1,=  2,-  1), 50.0 %
Seawall 20220818              :   8 (+  8,=  0,-  0), 100.0 %
Velvet 4.1.0                  :   8 (+  2,=  3,-  3), 43.8 %
Mantissa 3.7.2                :   4 (+  1,=  2,-  1), 50.0 %
Caissa 0.9.0                  :   6 (+  1,=  3,-  2), 41.7 %
Devre 3.13                    :   4 (+  0,=  4,-  0), 50.0 %
Fire-zero 08222022            :   4 (+  1,=  3,-  0), 62.5 %
Flaming Titz 230822           :   4 (+  0,=  0,-  4),  0.0 %
Viridithas 2.5.0              :   4 (+  3,=  1,-  0), 87.5 %
Wasp 6.00                     :   6 (+  0,=  2,-  4), 16.7 %
Atlas 4.25                    :   4 (+  1,=  3,-  0), 62.5 %
Blue Marlin 15.3a             :   4 (+  0,=  0,-  4),  0.0 %
Teal Oracle                   :   6 (+  0,=  2,-  4), 16.7 %
StockNemo 5.2.0.0             :   4 (+  4,=  0,-  0), 100.0 %
Crystal 4.1 Polyglot 220703   :   4 (+  0,=  0,-  4),  0.0 %
ShashChess 24                 :   6 (+  0,=  0,-  6),  0.0 %
Kayra 1.5 Dynamics            :   4 (+  0,=  1,-  3), 12.5 %
Fire-zero 09022022            :   1 (+  1,=  0,-  0), 100.0 %
BlackCore 1.0                 :   4 (+  4,=  0,-  0), 100.0 %
Fornax 3.0                    :   4 (+  4,=  0,-  0), 100.0 %
MadChess 3.1                  :   4 (+  4,=  0,-  0), 100.0 %
Viridithas 2.6.0              :   4 (+  4,=  0,-  0), 100.0 %
StockNemo 5.3.0.0             :   4 (+  4,=  0,-  0), 100.0 %
CT800 1.44                    :   4 (+  4,=  0,-  0), 100.0 %
Rusty Pigeon 1.0              :   4 (+  4,=  0,-  0), 100.0 %
BlackCore 1.1                 :  10 (+  9,=  1,-  0), 95.0 %
DeepShredder 13               :   2 (+  1,=  0,-  1), 50.0 %
Roc 1.9.1                     :   4 (+  2,=  2,-  0), 75.0 %
StockNemo 5.6.0.0             : 184 (+ 92,= 86,-  6), 73.4 %


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