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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