Raphael is a hobby project that is still a work in progress, but it will be updated as time goes by. It is nowhere near as competitive as some of the other chess engines out there, but it is strong enough to beat most humans with ease.
Author: Rei Meguro
Raphael 2.1 - what's new?
INon-functional changes
corrected mate distance in uci info
corrected pv line in uci info
added seldepth to uci info
go infinite no longer breaks early when it finds mate
rewrote into a fail soft implementation
implemented NNUE accumulator lazy updates
implemented PVS
added qsearch delta pruning
removed qsearch half move clock eval decay
removed qsearch SEE pruning
removed passed pawn extension
reworked history with gravity, reworked bonus, maluses, and removed clearing
corrected move ordering to 1. tt 2. good nonquiets 3. killer 4. history 5. bad nonquiets
corrected SEE for promotion and castling
Performance
v2.1 🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩⬜⬜⬜⬜⬜⬜🟥🟥🟥 v2.0 [135/ 83 / 42] (STC +130)
v2.1 🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩⬜⬜⬜⬜⬜🟥🟥 v2.0 [128 / 55 / 17] (LTC +217)
Estimated ELO: 2739
Jim Ablett compiles:
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