Syzygy endgame tablebases

Black is winning with DTZ 1

Qxf3+ DTM 26 Zeroing Qxh8 DTM 44 Zeroing Qf8 Win with DTZ 4 Qd8 Win with DTZ 6 Qd6 Win with DTZ 12

Qb6 Draw Qe7 Draw Qf5 Draw Qf7 Draw Qg6 Draw Qh4 Draw Qh6 Draw

Qf4 Loss with DTZ 4 Qg5 Loss with DTZ 4 Kc7 Loss with DTZ 1 Kd8 Loss with DTZ 1 Qa1+ Loss with DTZ 1 Qa6+ Loss with DTZ 1 Qb2 Loss with DTZ 1 Qc3 Loss with DTZ 1 Qc6+ Loss with DTZ 1 Qd4 Loss with DTZ 1 Qe5 Loss with DTZ 1 Qe6 Loss with DTZ 1 Qg7 Loss with DTZ 1

KBBNvKQ.pgn lichess.org

Histogram: KBBN losing vs. KQ (log scale)

Longest KBBNvKQ phases

KBBNvKQ statistics (unique positions)

White wins:
1,872,817,112 (22.6%)

Draws:
2,172,195,024 (26.2%)

Frustrated black wins:
187,643,772 (2.3%)

Black wins:
4,045,559,934 (48.9%)

KBBNvKQ.json (?)

KBBNvKQ dependencies

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

KBBNvK · KBNvKQ · KBBvKQ

KBBNvKQ.txt KBBNvKQ.dot