Syzygy endgame tablebases
White to move
Black to move
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Black is losing with DTZ 130
Qh8+
Loss with DTZ 129
Qg7+
Loss with DTZ 125
Qg8
Loss with DTZ 3
Kg4
Loss with DTZ 2
Qa7
Loss with DTZ 1
Qb1
Loss with DTZ 1
Qb7
Loss with DTZ 1
Qc2+
Loss with DTZ 1
Qc7+
Loss with DTZ 1
Qd3+
Loss with DTZ 1
Qd7
Loss with DTZ 1
Qe4
Loss with DTZ 1
Qe7
Loss with DTZ 1
Qf5
Loss with DTZ 1
Qf7
Loss with DTZ 1
Qg6
Loss with DTZ 1
Qh5
Loss with DTZ 1
Qh6
Loss with DTZ 1
Qxh4
DTM 3
Zeroing
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQBNvKQ.pgn
Histogram: KQBN winning vs. KQ (log scale)
Longest KQBNvKQ phases
KQBN winning with DTZ 100
KQBN winning with DTZ 130 (frustrated)
KQBN losing with DTZ 33
KQBNvKQ statistics
5,059,240,505 (69.0%)
6,440 (0.0%)
1,271,634,239 (17.3%)
1,004,512,982 (13.7%)
KQBNvKQ.json
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