A chess engine created by two high school students, started when we were in middle school!
| Version | CCRL Blitz | CCRL 40/15 | Lichess Blitz |
|---|---|---|---|
| v20250311T07 | ~1900 | - | 2000 |
| v1.0 | 2728 | - | 2500 |
| v20250421T23-dev | ~3000 | - | 2600 |
| v2.0 | 3012 | - | 2650 |
| v20250621T09-dev | ~3100 | - | 2700 |
| v20250623T22-dev | ~3160 | - | - |
PZChessBot is a basic negamax engine.
- Basic alpha-beta pruning
- Quiescence search
- Principal-Variation Search
- Late-move reductions
- Transposition tables
- Null-move pruning
- Move ordering using MVV+CaptHist, killer moves, history heuristic, and counter moves
- Aspiration windows and iterative deepening
- Check extensions
- Futility and reverse futility pruning
- Hybrid bitboard + mailbox representation
- PEXT bitboards for lightning fast move generation
- NNUE-type evaluation with king buckets
- Runs a (24576->256)x2->8 model
- Trained on a mix of Stockfish and LC0 Data