Syzygy endgame tablebases

White is losing with DTZ 246

Kf5 Loss with DTZ 245

Kf3 Loss with DTZ 21 Kd3 Loss with DTZ 7 Be5 Loss with DTZ 3 Kd4 Loss with DTZ 3 Kd5 Loss with DTZ 3 Kf4 Loss with DTZ 3

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

KBBPvKQ.pgn lichess.org

Histogram: KBBP losing vs. KQ (log scale)

Longest KBBPvKQ phases

KBBPvKQ statistics (unique positions)

White wins:
5,373,776,982 (21.0%)

Frustrated white wins:
876,436 (0.0%)

Draws:
3,727,151,424 (14.6%)

Frustrated black wins:
541,063,170 (2.1%)

Black wins:
15,957,643,312 (62.3%)

KBBPvKQ.json (?)

KBBPvKQ dependencies

To probe all KBBPvKQ positions, these tables and their transitive dependencies are also required:

KQBBvKQ · KBBPvK · KRBBvKQ · KBBBvKQ · KBPvKQ · KBBNvKQ · KBBvKQ

KBBPvKQ.txt KBBPvKQ.dot