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Syzygy endgame tablebases

Black is losing with DTZ 164

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

KRRBvKQ.pgn

Histogram: KRRB winning (log scale)

Longest KRRBvKQ phases

KRRBvKQ statistics

4,924,729,003 (66.3%)
693,854 (0.0%)
2,116,388,889 (28.5%)
385,609,706 (5.2%)
KRRBvKQ.json (?)