Syzygy endgame tablebases

Black is losing with DTZ 250

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


Histogram: KRRBP winning vs. KQ (log scale)

Longest KRRBPvKQ phases

KRRBPvKQ statistics (unique positions)

White wins:
960,470,124,464 (73.8%)
Frustrated white wins:
1,249,857,086 (0.1%)
300,738,003,220 (23.1%)
Frustrated black wins:
17,116,324 (0.0%)
Black wins:
39,182,881,508 (3.0%)
KRRBPvKQ.json (?)