Syzygy endgame tablebases
White to move
Black to move
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Black is losing with DTZ 108
Bd3+
Loss with DTZ 107
Bg5
Loss with DTZ 5
Bc5
Loss with DTZ 3
Bd2
Loss with DTZ 3
Bf2
Loss with DTZ 3
Bf4
Loss with DTZ 3
Bg1
Loss with DTZ 3
Bh6
Loss with DTZ 3
Kb5
Loss with DTZ 1
Kc5
Loss with DTZ 1
Kc6
Loss with DTZ 1
Bc1
Loss with DTZ 1
Bd4
Loss with DTZ 1
Ba6
Loss with DTZ 1
Bb5
Loss with DTZ 1
Bc4
Loss with DTZ 1
Be2
Loss with DTZ 1
Bg2
Loss with DTZ 1
Bh3
Loss with DTZ 1
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQRvKBB.pgn
lichess.org
Histogram: KQR winning vs. KBB (log scale)
⋮
Longest KQRvKBB phases
KQR winning with DTZ 24
KQR winning with DTZ 109 (frustrated)
KQR losing with DTZ 7
KQRvKBB statistics (unique positions)
White wins:
6,464,566,216 (83.1%)
Frustrated white wins:
12,458,948 (0.2%)
Draws:
1,288,271,526 (16.6%)
Black wins:
10,516,394 (0.1%)
KQRvKBB.json
(?)