Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Tablebase draw
Qa4
Draw
Qb5+
Draw
Qb7+
Draw
Qc8
Draw
Qd1+
Draw
Qd3
Draw
Qd5
Draw
Qd8
Draw
Qe7
Draw
Qe8
Draw
Qf5
Draw
Qf7
Draw
Qg7
Draw
Qh3
Draw
Qh7
Draw
Kd1
Draw
Kd2
Draw
Kd3
Draw
Kf1
Draw
Kf3
Draw
Qg4
Loss with DTZ 55
Qd2
Loss with DTZ 45
Qc6
Loss with DTZ 3
Qe6
Loss with DTZ 3
Qc7
Loss with DTZ 1
Qd4
Loss with DTZ 1
Qd6
Loss with DTZ 1
Qxa7
Zeroing
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
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