PZChessBot is a basic negamax engine.
Author: Kevin Lu
v.2.0 What's Changed
bench: 120629 add lmr to main by @kevlu8 in #33
Add output buckets to NNUE by @kevlu8 in #34
bench: 299703 tune network on .65 wdl by @kevlu8 in #35
bench: 309079 fully retrain network with low wdl by @kevlu8 in #36
bench: 273173 add history by @kevlu8 in #37
bench: 273173 Switch to proper move ordering scheme by @kevlu8 in #38
bench: 273173 add pv printing by @kevlu8 in #40
bench: 184778 add counter-move history by @kevlu8 in #41
bench: 96074 add IIR by @kevlu8 in #42
Fix 50-move rule handling - also fixes a part of illegal PV by @kevlu8 in #43
Add reverse futility pruning by @kevlu8 in #44
bench: 63404 disable nmp when pieces < 8 by @kevlu8 in #45
Add EGNN evaluation for positions under 12 pieces by @kevlu8 in #47
Prevent storing of the same killer move by @kevlu8 in #48
bench: 192920 fix pvs pv issue, also partially fixing low nps issue by @kevlu8 in #50
Should be around 3100 strength... I forgot to release so this is long overdue but its ok!
PzChessBot 20250311T07 JA vs other engines:
| Melsh Bot 1.0 JA | 3/4 | +2 | 4 Games |
| Maello 0.1 JA | 1/4 | -2 | 4 Games |
| Critter 1.6a | 0/4 | -4 | 4 Games |
| Rodent IV 0.33 JA | 0/4 | -4 | 4 Games |
| Princhess 0.20 JA | 0/4 | -4 | 4 Games |
| Perseus 1.0 JA | 0/4 | -4 | 4 Games |
| Seawall 20250322 JA | 0/4 | -4 | 4 Games |
| Renegade 1.1.98 JA | 0/4 | -4 | 4 Games |
| Chesslib 0.0.3 JA | 0.5/3 | -2 | 3 Games |
| Victoria 0.1 JA | 2/2 | +2 | 2 Games |
| Ultrabrick dev.bd5adb0 JA | 2/2 | +2 | 2 Games |
| Gravy 1.0 JA | 2/2 | +2 | 2 Games |
| Kopyto 0.1.0 JA | 1/2 | +0 | 2 Games |
| Meltdown 0.1 JA | 0.5/2 | -1 | 2 Games |
| Limbobot 0.1 JA | 0/2 | -2 | 2 Games |
| Chess-3 JA | 0/2 | -2 | 2 Games |
| Cinder 0.1.3 JA | 0/2 | -2 | 2 Games |
| Dumb 2.3 | 0/2 | -2 | 2 Games |
| PlentyChess 5.0.0 | 0/2 | -2 | 2 Games |
| Quanticade Fenrir 1.0 JA | 0/2 | -2 | 2 Games |
| Shallow Guess 0.1.0 JA | 0/2 | -2 | 2 Games |
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