Crafty 25.2.1 - First UCI-capable release chess engine

Crafty - winboard chess engines
Author - Robert Hyatt (USA), Rating Chess Engines Diary CEDR=2950 

Crafty 25.2.1 what's new?

First UCI-capable release of Crafty — the classic engine by Dr. Robert Hyatt, now usable directly in modern GUIs (Arena, Cute Chess, Nibbler, BanksiaGUI, ChessBase, …) alongside its original WinBoard/xboard and native console interfaces (auto-detected from the first command).

Downloads — pick by your CPU

File Tier Requires

crafty-25.2.1-win-x86-64-v3.exe Cutting-edge (fastest) AVX2 / BMI2 — Intel Haswell (2013+) / AMD Zen

crafty-25.2.1-win-x86-64-v2.exe In-between SSE4.2 / popcnt (2008+)

crafty-25.2.1-win-x86-64.exe Basic / max compatibility any 64-bit x86 CPU

All are 64-bit Windows builds compiled with -O3 + profile-guided optimization (PGO), with Syzygy tablebase support and multi-threading (up to 64 threads). If unsure, try v3 first; if it won't launch, fall back to v2, then the basic build.

Highlights

Full UCI protocol: position, go (depth / movetime / clock / infinite / ponder), stop, ponderhit, streaming info (incl. seldepth and currmove/currmovenumber), bestmove, and options: Hash, Threads, Ponder, SyzygyPath, OwnBook/BookFile, Move Overhead.

Clean info output: one PV line per depth (no duplicate end-of-iteration copy).

UCI time-management & robustness fixes: correct ponder default, 50-move tracking from a FEN, well-behaved go infinite/ponder bestmove timing, and a volatile cross-thread stop flag.

WinBoard/xboard and native console interfaces unchanged.

github:https://github.com/stevemaughan/Crafty-Chess

Crafty 25.6 results:

Godel 7.0	3/10	-4	10 Games
Tucano 8.00	6/8	+4	8 Games
Bobcat 8.0	4/8	+0	8 Games
Asymptote 0.8	4/6	+2	6 Games
Hakkapeliitta TCEC	4/6	+2	6 Games
TogaII 4.01	3.5/6	+1	6 Games
Topple 0.7.5	3/6	+0	6 Games
Gaviota 1.0	3/6	+0	6 Games
Amoeba 3.1	1.5/6	-3	6 Games
Cheng 4.39	1.5/6	-3	6 Games
Belofte 0.9.12	4/5	+3	5 Games
Fruit reloaded 3.2.1	3/4	+2	4 Games
Counter 3.5	2/4	+0	4 Games
Sctr 1.1f	2/4	+0	4 Games
Bulldog 2.1	1.5/4	-1	4 Games
Naum 4.6	1/4	-2	4 Games
Nemorino 5.28	0.5/4	-3	4 Games
ChessBrainVB 3.74	0.5/4	-3	4 Games
Alfil 15.8	0/4	-4	4 Games
Protector 1.9.0	0/4	-4	4 Games
HonzovySachy 2.0 2019-12-07	2/2	+2	2 Games

Crafty 25.2.1 download