Syzygy endgame tablebases

Black is losing with DTZ 108

Bd3+ Loss with DTZ 107

Bg5 Loss with DTZ 5 Bc5 Loss with DTZ 3 Bd2 Loss with DTZ 3 Bf2 Loss with DTZ 3 Bf4 Loss with DTZ 3 Bg1 Loss with DTZ 3 Bh6 Loss with DTZ 3 Kb5 Loss with DTZ 1 Kc5 Loss with DTZ 1 Kc6 Loss with DTZ 1 Bc1 Loss with DTZ 1 Bd4 Loss with DTZ 1 Ba6 Loss with DTZ 1 Bb5 Loss with DTZ 1 Bc4 Loss with DTZ 1 Be2 Loss with DTZ 1 Bg2 Loss with DTZ 1 Bh3 Loss with DTZ 1

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

KQRvKBB.pgn lichess.org

Histogram: KQR winning vs. KBB (log scale)

⋮

Longest KQRvKBB phases

KQRvKBB statistics (unique positions)

White wins:
6,464,566,216 (83.1%)

Frustrated white wins:
12,458,948 (0.2%)

Draws:
1,288,271,526 (16.6%)

Black wins:
10,516,394 (0.1%)

KQRvKBB.json (?)

KQRvKBB dependencies

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

KBBvKR · KBBvKQ · KQRvKB

KQRvKBB.txt KQRvKBB.dot