Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Tablebase draw
Qb7
Draw
Qc6
Draw
Qe7+
Draw
Qg7
Draw
Qh3+
Draw
Qg4
Loss with DTZ 57
Kd1
Loss with DTZ 55
Ke2
Loss with DTZ 49
Qd2
Loss with DTZ 47
Kf1
Loss with DTZ 47
Qd5
Loss with DTZ 45
Qh7
Loss with DTZ 45
Kd2
Loss with DTZ 45
Qb5
Loss with DTZ 44
Qf7
Loss with DTZ 44
Qf5
Loss with DTZ 43
Qd1
Loss with DTZ 41
Qd3+
Loss with DTZ 41
Qe6
Loss with DTZ 41
Qc8
Loss with DTZ 3
Qd8
Loss with DTZ 3
Qe8
Loss with DTZ 3
Qa4+
Loss with DTZ 1
Qa7+
Loss with DTZ 1
Qc7
Loss with DTZ 1
Qd4
Loss with DTZ 1
Qd6+
Loss with DTZ 1
KRBBNvKQ.pgn
lichess.org
Histogram: KRBBN winning vs. KQ (log scale)
Longest KRBBNvKQ phases
KRBBN winning with DTZ 100
KRBBN winning with DTZ 380 (frustrated)
KRBBN losing with DTZ 132 (frustrated)
KRBBN losing with DTZ 41
KRBBNvKQ statistics (unique positions)
White wins:
274,292,994,419 (62.4%)
Frustrated white wins:
99,663,112 (0.0%)
Draws:
138,469,313,381 (31.5%)
Frustrated black wins:
2,380,920,624 (0.5%)
Black wins:
23,985,948,792 (5.5%)
KRBBNvKQ.json
(?)