Chess Engines Diary

ShakeyBot is a UCI chess engine written in C++. It uses hand-crafted evaluation. In local testing against FabChess Version 1.8, a public engine with a listed strength around 2400 Elo, ShakeyBot scored slightly ahead. This is a local estimate, not an official rating-list result. Author: Daniel John Collins ShakeyBot 2.0.0 what's new? ShakeyBot v2.0.0 is the first public neural-evaluation release and a major strength upgrade over the hand-crafted-evaluation releases. The default engine now uses a quantized HalfKP NNUE-style evaluator with accumulator updates. Default model: models/halfkp_wp_h512_e15_500m_clip30_quant.txt Default backend: neural_halfkp_quant_accum Strength Estimate Local tournament against Ceibo v1.0: Scope    W-D-L        Score        Score %   Elo diff       95% CI Overall  651-266-202  784.0/1119   70.06%   +147.7         +128.9 to +166....

ShakeyBot is a UCI chess engine written in C++. It uses hand-crafted evaluation. In local testing against FabChess Version 1.8, a public engine with a listed strength around 2400 Elo, ShakeyBot scored slightly ahead. This is a local estimate, not an official rating-list result. Author: Daniel John Collins ShakeyBot 1.1.0 what's new? Summary ShakeyBot v1.1.0 is a stronger hand-crafted-evaluation release focused on search stability, tactical pruning safety, transposition-table correctness, and repository cleanup. This release keeps ShakeyBot as a classical HCE engine. No neural-network evaluation is used (yet). Strength Estimate Local match against FabChess Version 1.8 at 10 seconds per 50 moves: Score of ShakeyBot vs FabChess Version 1.8: 355 - 285 - 106 [0.547] ...      ShakeyBot  playing White: 171 - 142 - 60  [0.539] 373 ...      ShakeyBot playing Black: 184 - 143 - 46  [0.555] 373 ...      White vs Black: 314 - 326 - 106...