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Chess engine: Peacekeeper 1.60

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Peacekeeper - UCI engine
Author: Kyle Zhang  Rating CEDR=2845

v.1.60:
Features
Board Representation and Move Generation
Bitboard-based
Redundant Mailbox Board
Make-Unmake
Fixed-shift Fancy Magic Bitboards for slider move generation
Legal move generation
Search
Principal Variation Search (PVS)
Quiescence Search
Iterative Deepening
Staged Move Generation
Hash move
Captures
Quiets
Time management
Transposition Table
Incrementally updated Zobrist hash
Selectivity
Check Extensions
Static Null Move Pruning/Reverse Futility Pruning (SNMP/RFP)
Null Move Pruning (NMP)
Late Move Reductions (LMR)
Futility Pruning
Delta Pruning
Move Ordering
MVV-LVA for captures
History Heuristic for quiet moves
Evaluation
Texel Tuned
Piece Square Tables (PST)
Incrementally updated
Tapered Eval
Tempo Bonus

Peacekeeper rating CEDR progress:
Pl
 Version
 CEDR
 Score games
 %
901 Peacekeeper 1.50 2845.2 37.00 107 34.58
909 Peacekeeper 1.4 2829.6 7.00 34 20.59
971 Peacekeeper 1.2 2736.9 15.00 94 15.96
1057 Peacekeeper 1.3 2586.1 34.00 129 26.36
1079 Peacekeeper 1.1 2542.8 25.00 98 25.51
1116 Peacekeeper 1.01 2476.7 15.00 64 23.44
1147 Peacekeeper 1.0 2416.6 13.50 110 12.27
1175 Peacekeeper 0.11 2373.8 19.00 104 18.27
1180 Peacekeeper 0.12 2366.9 47.50 246 19.31
1395 Peacekeeper 0.1 1883.0 4.00 33 12.12


Individual statistics: Peacekeeper 1.40 - 76 games (+ 14,= 11,- 51), 25.7  %
Akimbo 0.2.0                  :   2 (+  1,=  1,-  0), 75.0 %
SFT-PB                        :   2 (+  0,=  0,-  2),  0.0 %
Tenax 0.7.9                   :   4 (+  0,=  0,-  4),  0.0 %
Zangdar 2.15.03               :   4 (+  1,=  1,-  2), 37.5 %
Polaris 1.5.0                 :   4 (+  1,=  2,-  1), 50.0 %
Caissa 1.8                    :   4 (+  0,=  0,-  4),  0.0 %
SFT 26.04.2023                :   4 (+  0,=  0,-  4),  0.0 %
Mess 0.2.0                    :   4 (+  1,=  2,-  1), 50.0 %
Apotheosis 3.0.0              :   4 (+  4,=  0,-  0), 100.0 %
Queen 4.05                    :   4 (+  1,=  2,-  1), 50.0 %
Rice 5.0.0                    :   4 (+  0,=  0,-  4),  0.0 %
Polyfish 230426               :   4 (+  0,=  0,-  4),  0.0 %
SugaR AI ICCF SE              :   4 (+  0,=  0,-  4),  0.0 %
Flounder 0.5.0.0              :   4 (+  0,=  0,-  4),  0.0 %
Roc 2.0.0                     :   4 (+  0,=  0,-  4),  0.0 %
ChessKISS 1.8d                :   4 (+  3,=  1,-  0), 87.5 %
Svart 4.0.0                   :   4 (+  0,=  1,-  3), 12.5 %
nIPPOLIT                      :   4 (+  2,=  1,-  1), 62.5 %
Stockfish 20230422 Ivec       :   2 (+  0,=  0,-  2),  0.0 %
Stockfish 2030422             :   2 (+  0,=  0,-  2),  0.0 %
SF-PB 220423                  :   2 (+  0,=  0,-  2),  0.0 %
Corchess 20230422             :   2 (+  0,=  0,-  2),  0.0 %


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