Syzygy endgame tablebases

White is losing with DTZ 144

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

KBBBvKQB.pgn lichess.org

Histogram: KBBB losing vs. KQB (log scale)

Longest KBBBvKQB phases

KBBBvKQB statistics (unique positions)

White wins:
22,080,792,804 (5.0%)
Draws:
94,148,119,947 (21.5%)
Frustrated black wins:
3,747,931,782 (0.9%)
Black wins:
318,291,340,533 (72.6%)
KBBBvKQB.json (?)