Syzygy endgame tablebases

Black is losing with DTZ 130

Qh8+ Loss with DTZ 129 Qg7+ Loss with DTZ 125

Qg8 Loss with DTZ 3 Kg4 Loss with DTZ 2 Qa7 Loss with DTZ 1 Qb1 Loss with DTZ 1 Qb7 Loss with DTZ 1 Qc2+ Loss with DTZ 1 Qc7+ Loss with DTZ 1 Qd3+ Loss with DTZ 1 Qd7 Loss with DTZ 1 Qe4 Loss with DTZ 1 Qe7 Loss with DTZ 1 Qf5 Loss with DTZ 1 Qf7 Loss with DTZ 1 Qg6 Loss with DTZ 1 Qh5 Loss with DTZ 1 Qh6 Loss with DTZ 1 Qxh4 DTM 3 Zeroing

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

KQBNvKQ.pgn lichess.org

Histogram: KQBN winning vs. KQ (log scale)

Longest KQBNvKQ phases

KQBNvKQ statistics (unique positions)

White wins:
5,059,240,505 (69.0%)

Frustrated white wins:
6,440 (0.0%)

Draws:
1,271,634,239 (17.3%)

Black wins:
1,004,512,982 (13.7%)

KQBNvKQ.json (?)

KQBNvKQ dependencies

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

KBNvKQ · KQBNvK · KQNvKQ · KQBvKQ

KQBNvKQ.txt KQBNvKQ.dot