Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Black is losing with DTZ 130
Qd4+
Loss with DTZ 129
Qd6+
Loss with DTZ 17
Qa7
Loss with DTZ 9
Qc6
Loss with DTZ 9
Qc7
Loss with DTZ 9
Qa6
Loss with DTZ 7
Qe6
Loss with DTZ 5
Qe3
Loss with DTZ 3
Qf6
Loss with DTZ 3
Qa5
Loss with DTZ 1
Qb1+
Loss with DTZ 1
Qb2
Loss with DTZ 1
Qb3+
Loss with DTZ 1
Qb4
Loss with DTZ 1
Qb5
Loss with DTZ 1
Qb7
Loss with DTZ 1
Qc5
Loss with DTZ 1
Qd8+
Loss with DTZ 1
Qg6
Loss with DTZ 1
Qh6
Loss with DTZ 1
Ke3
Loss with DTZ 1
Kf1
Loss with DTZ 1
Kf3
Loss with DTZ 1
Qxb8
DTM 9
Zeroing
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KRRRvKQ.pgn
Histogram: KRRR winning vs. KQ (log scale)
Longest KRRRvKQ phases
KRRR winning with DTZ 100
KRRR winning with DTZ 130 (frustrated)
KRRR losing with DTZ 27
KRRRvKQ statistics
5,243,837,190 (74.7%)
34,200 (0.0%)
1,617,696,372 (23.0%)
159,890,868 (2.3%)
KRRRvKQ.json
(?)