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Syzygy endgame tablebases

Black is losing with DTZ 140

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.

KRRRBvKQ.pgn

Histogram: KRRRB winning (log scale)

Longest KRRRBvKQ phases

KRRRBvKQ statistics

376,555,520,850 (95.4%)
10,671,234 (0.0%)
16,371,765,177 (4.1%)
1,606,475,949 (0.4%)
KRRRBvKQ.json (?)