Syzygy endgame tablebases
White to move
Black to move
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White is losing with DTZ 112
Qb7+
Loss with DTZ 111
Qd6+
Loss with DTZ 15
Qf6+
Loss with DTZ 15
Bb7+
Loss with DTZ 15
Ke8
Loss with DTZ 5
Qe5
Loss with DTZ 5
Kd7
Loss with DTZ 3
Qd7
Loss with DTZ 3
Qe8
Loss with DTZ 3
Qf8
Loss with DTZ 3
Qg7
Loss with DTZ 3
Qh7
Loss with DTZ 3
Be2
Loss with DTZ 3
Bc7
Loss with DTZ 3
Qa3+
Loss with DTZ 1
Qa7+
Loss with DTZ 1
Qb4
Loss with DTZ 1
Qc5
Loss with DTZ 1
Qc7
Loss with DTZ 1
Qe1
Loss with DTZ 1
Qe2
Loss with DTZ 1
Qe3
Loss with DTZ 1
Qe4
Loss with DTZ 1
Qe6+
Loss with DTZ 1
Qf7
Loss with DTZ 1
Qg5
Loss with DTZ 1
Qh4
Loss with DTZ 1
Ba8
Loss with DTZ 1
Bc6
Loss with DTZ 1
Bd1
Loss with DTZ 1
Bd5
Loss with DTZ 1
Be4
Loss with DTZ 1
Bg2
Loss with DTZ 1
Bg4
Loss with DTZ 1
Bh1
Loss with DTZ 1
Bh5
Loss with DTZ 1
Bb8
Loss with DTZ 1
Bd6
Loss with DTZ 1
Be1
Loss with DTZ 1
Be5
Loss with DTZ 1
Bf2
Loss with DTZ 1
Bf4
Loss with DTZ 1
Bh2
Loss with DTZ 1
Bh4
Loss with DTZ 1
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQBBvKQQ.pgn
lichess.org
Histogram: KQBB losing vs. KQQ (log scale)
Longest KQBBvKQQ phases
KQBB winning with DTZ 100
KQBB winning with DTZ 144 (frustrated)
KQBB losing with DTZ 249 (frustrated)
KQBB losing with DTZ 100
KQBBvKQQ statistics (unique positions)
White wins:
73,255,125,086 (21.6%)
Frustrated white wins:
47,379,422 (0.0%)
Draws:
66,887,261,032 (19.7%)
Frustrated black wins:
2,955,100,724 (0.9%)
Black wins:
196,135,819,030 (57.8%)
KQBBvKQQ.json
(?)