Syzygy endgame tablebases

Black is losing with DTZ 174

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

KQBBBvKQ.pgn lichess.org

Histogram: KQBBB winning vs. KQ (log scale)

Longest KQBBBvKQ phases

KQBBBvKQ statistics (unique positions)

White wins:
336,272,477,604 (85.5%)
Frustrated white wins:
18,114,654 (0.0%)
Draws:
42,436,229,022 (10.8%)
Frustrated black wins:
1,969,119,540 (0.5%)
Black wins:
12,759,169,812 (3.2%)
KQBBBvKQ.json (?)