Syzygy endgame tablebases
White to move
Black to move
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Black is losing with DTZ 240
Bh4+
Loss with DTZ 239
Qb8
Loss with DTZ 11
Qc2+
Loss with DTZ 7
Qh8
Loss with DTZ 7
Ka4
Loss with DTZ 1
Kb2
Loss with DTZ 1
Kb4
Loss with DTZ 1
Qa8
Loss with DTZ 1
Qc1
Loss with DTZ 1
Qc3
Loss with DTZ 1
Qc4
Loss with DTZ 1
Qc5+
Loss with DTZ 1
Qc6
Loss with DTZ 1
Qc7
Loss with DTZ 1
Qd7
Loss with DTZ 1
Qd8
Loss with DTZ 1
Qe6
Loss with DTZ 1
Qe8
Loss with DTZ 1
Qf5+
Loss with DTZ 1
Qf8
Loss with DTZ 1
Qg4
Loss with DTZ 1
Qg8
Loss with DTZ 1
Qh3
Loss with DTZ 1
Bc1
Loss with DTZ 1
Bd2
Loss with DTZ 1
Bd8
Loss with DTZ 1
Be3+
Loss with DTZ 1
Be7
Loss with DTZ 1
Bf4
Loss with DTZ 1
Bf6
Loss with DTZ 1
Bh6
Loss with DTZ 1
Qxb7
Zeroing
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQBPvKQB.pgn
lichess.org
Histogram: KQBP winning vs. KQB (log scale)
Longest KQBPvKQB phases
KQBP winning with DTZ 100
KQBP winning with DTZ 240 (frustrated)
KQBP losing with DTZ 131 (frustrated)
KQBP losing with DTZ 100
KQBPvKQB statistics (unique positions)
White wins:
465,711,047,131 (37.6%)
Frustrated white wins:
61,172,978 (0.0%)
Draws:
511,608,178,346 (41.3%)
Frustrated black wins:
4,605 (0.0%)
Black wins:
260,753,849,138 (21.1%)
KQBPvKQB.json
(?)