Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Black is losing with DTZ 162
Qd7+
Loss with DTZ 161
Qe2+
Loss with DTZ 21
Qh5
Loss with DTZ 11
Qh1
Loss with DTZ 6
Qa4
Loss with DTZ 3
Qb3
Loss with DTZ 3
Qd5
Loss with DTZ 3
Qf1
Loss with DTZ 3
Qf3
Loss with DTZ 3
Qg1
Loss with DTZ 3
Qg4
Loss with DTZ 3
Qb1
Loss with DTZ 2
Qa1
Loss with DTZ 1
Qc1
Loss with DTZ 1
Qc2
Loss with DTZ 1
Qd2
Loss with DTZ 1
Qd3
Loss with DTZ 1
Qd4
Loss with DTZ 1
Qd6+
Loss with DTZ 1
Qd8+
Loss with DTZ 1
Qe1+
Loss with DTZ 1
Kxb7
Zeroing
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQRBPvKQ.pgn
lichess.org
Histogram: KQRBP winning vs. KQ (log scale)
Longest KQRBPvKQ phases
KQRBP winning with DTZ 100
KQRBP winning with DTZ 163 (frustrated)
KQRBP losing with DTZ 111 (frustrated)
KQRBP losing with DTZ 29
KQRBPvKQ statistics (unique positions)
White wins:
1,075,538,141,282 (89.0%)
Frustrated white wins:
41,065,481 (0.0%)
Draws:
115,020,791,426 (9.5%)
Frustrated black wins:
6,400,705 (0.0%)
Black wins:
17,812,035,574 (1.5%)
KQRBPvKQ.json
(?)