Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Black is losing with DTZ 222
Ke4
Loss with DTZ 221
Kg4
Loss with DTZ 29
Kf5
Loss with DTZ 27
Kg5
Loss with DTZ 17
Kf3
Loss with DTZ 13
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQBPvKQ.pgn
Histogram: KQBP winning vs. KQ (log scale)
Longest KQBPvKQ phases
KQBP winning with DTZ 100
KQBP winning with DTZ 222 (frustrated)
KQBP losing with DTZ 35
KQBPvKQ statistics
15,461,045,961 (68.4%)
2,171,290 (0.0%)
4,020,034,138 (17.8%)
3,128,774,307 (13.8%)
KQBPvKQ.json
(?)