Syzygy endgame tablebases

White is losing with DTZ 112

Qb7+ Loss with DTZ 111

Qd6+ Loss with DTZ 15 Qf6+ Loss with DTZ 15 Bb7+ Loss with DTZ 15 Ke8 Loss with DTZ 5 Qe5 Loss with DTZ 5 Kd7 Loss with DTZ 3 Qd7 Loss with DTZ 3 Qe8 Loss with DTZ 3 Qf8 Loss with DTZ 3 Qg7 Loss with DTZ 3 Qh7 Loss with DTZ 3 Be2 Loss with DTZ 3 Bc7 Loss with DTZ 3 Qa3+ Loss with DTZ 1 Qa7+ Loss with DTZ 1 Qb4 Loss with DTZ 1 Qc5 Loss with DTZ 1 Qc7 Loss with DTZ 1 Qe1 Loss with DTZ 1 Qe2 Loss with DTZ 1 Qe3 Loss with DTZ 1 Qe4 Loss with DTZ 1 Qe6+ Loss with DTZ 1 Qf7 Loss with DTZ 1 Qg5 Loss with DTZ 1 Qh4 Loss with DTZ 1 Ba8 Loss with DTZ 1 Bc6 Loss with DTZ 1 Bd1 Loss with DTZ 1 Bd5 Loss with DTZ 1 Be4 Loss with DTZ 1 Bg2 Loss with DTZ 1 Bg4 Loss with DTZ 1 Bh1 Loss with DTZ 1 Bh5 Loss with DTZ 1 Bb8 Loss with DTZ 1 Bd6 Loss with DTZ 1 Be1 Loss with DTZ 1 Be5 Loss with DTZ 1 Bf2 Loss with DTZ 1 Bf4 Loss with DTZ 1 Bh2 Loss with DTZ 1 Bh4 Loss with DTZ 1

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

KQBBvKQQ.pgn lichess.org

Histogram: KQBB losing vs. KQQ (log scale)

Longest KQBBvKQQ phases

KQBBvKQQ statistics (unique positions)

White wins:
73,255,125,086 (21.6%)

Frustrated white wins:
47,379,422 (0.0%)

Draws:
66,887,261,032 (19.7%)

Frustrated black wins:
2,955,100,724 (0.9%)

Black wins:
196,135,819,030 (57.8%)

KQBBvKQQ.json (?)

KQBBvKQQ dependencies

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

KQQvKBB · KQBBvKQ · KQQvKQB

KQBBvKQQ.txt KQBBvKQQ.dot