Syzygy endgame tablebases

Black is losing with DTZ 130

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

KQBNvKQ.pgn lichess.org

Histogram: KQBN winning vs. KQ (log scale)

Longest KQBNvKQ phases

KQBNvKQ statistics (unique positions)

White wins:
5,059,240,505 (69.0%)
Frustrated white wins:
6,440 (0.0%)
Draws:
1,271,634,239 (17.3%)
Black wins:
1,004,512,982 (13.7%)
KQBNvKQ.json (?)