Very Sub Optimal Mating
Author: mstemberaCreated Sep 2, 2026Updated Sep 4, 2026
Describe the issue
Starting with move 88 in this CCC game https://www.chess.com/computer-chess-championship#event=504&game=1132 SF makes many useless king moves leading to a much longer mating sequence than necessary. Also it keeps displaying TB scores until move 101 not mate scores.
Expected behavior
Find shortest mate in such a simple position.
Steps to reproduce
Step through game https://www.chess.com/computer-chess-championship#event=504&game=1132
Anything else?
No response
Operating system
All
Stockfish version
dev-20260829-8bc5caa2
Source: official-stockfish/Stockfish