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Syzygy endgame tablebases

Black is losing with DTZ 186

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

KQBBvKQ.pgn

Histogram: KQBB winning (log scale)

Longest KQBBvKQ phases

KQBBvKQ statistics

4,820,374,547 (67.8%)
1,448,774 (0.0%)
1,393,393,258 (19.6%)
76,776,090 (1.1%)
821,158,283 (11.5%)
KQBBvKQ.json (?)