Syzygy endgame tablebases

Black is losing with DTZ 110

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.

KQBvKBB.pgn lichess.org

Histogram: KQB winning vs. KBB (log scale)

Longest KQBvKBB phases

KQBvKBB statistics (unique positions)

White wins:
6,617,520,108 (81.7%)
Frustrated white wins:
13,090,770 (0.2%)
Draws:
1,455,641,622 (18.0%)
Black wins:
11,063,938 (0.1%)
KQBvKBB.json (?)

KQBvKBB dependencies

To probe all KQBvKBB positions, these tables and their transitive dependencies are also required:

KBBvKB · KBBvKQ · KQBvKB

KQBvKBB.txt KQBvKBB.dot