Syzygy endgame tablebases

Black is losing with DTZ 240

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

KQBPvKQB.pgn lichess.org

Histogram: KQBP winning vs. KQB (log scale)

Longest KQBPvKQB phases

KQBPvKQB statistics (unique positions)

White wins:
465,711,047,131 (37.6%)
Frustrated white wins:
61,172,978 (0.0%)
Draws:
511,608,178,346 (41.3%)
Frustrated black wins:
4,605 (0.0%)
Black wins:
260,753,849,138 (21.1%)
KQBPvKQB.json (?)