Wrong evaluation for wrong color bishop.
Author: AliceRoseliaCreated Dec 17, 2025Updated Aug 29, 2026
Describe the issue
Stockfish gives a very wrong evaluation on wrong color bishop positions. (1 pawn or more). This does not occur with other drawn endgames I've tested such as two knights endgame. Whether or not this affects playing strength has yet to be tested.
Expected behavior
The evaluation should be drawn or close to draw.
Steps to reproduce
Try Stockfish on wrong color bishop position such as 4k3/8/p3b3/8/8/8/8/K7 w - - 0 2
Tablebase off.
Anything else?
No response
Operating system
All
Stockfish version
Stockfish dev-20251203-c109a88e
Source: official-stockfish/Stockfish