Syzygy endgame tablebases

White is losing with DTZ 134

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

KBBBvKQR.pgn lichess.org

Histogram: KBBB losing vs. KQR (log scale)

Longest KBBBvKQR phases

KBBBvKQR statistics (unique positions)

White wins:
30,018,944,070 (7.1%)
Frustrated white wins:
106,020,477 (0.0%)
Draws:
75,299,456,391 (17.9%)
Frustrated black wins:
3,551,157,339 (0.8%)
Black wins:
311,385,861,261 (74.1%)
KBBBvKQR.json (?)