Syzygy endgame tablebases

White is winning with DTZ 1

Qxb4 Zeroing Qa2+ Win with DTZ 2 Qa4+ Win with DTZ 2 Qd5+ Win with DTZ 2 Qf3+ Win with DTZ 2 Ra2+ Win with DTZ 2 Qc4 Win with DTZ 4 Rc2 Win with DTZ 4 Qc2 Win with DTZ 6 Qf7 Win with DTZ 6 Rf2 Win with DTZ 6 Rh5 Win with DTZ 6 Rh8 Win with DTZ 6 Qg8 Win with DTZ 8 Qe6 Win with DTZ 10 Re2 Win with DTZ 14 Qd3 Win with DTZ 16 Kd7 Win with DTZ 18 Rh6 Win with DTZ 20

Qb2 Draw Qc3 Draw Qd1 Draw Kd8 Draw Bc7 Draw Bd6 Draw Be5 Draw Bf4 Draw Bh4 Draw Rb2 Draw Rd2 Draw Rg2 Draw Rh1 Draw Rh3 Draw Rh4 Draw Rh7 Draw

Bf2 Loss with DTZ 16 Bb8 Loss with DTZ 12 Kc7 Loss with DTZ 8 Be1 Loss with DTZ 8 Qa3+ Loss with DTZ 1 Qb1 Loss with DTZ 1 Qe3 Loss with DTZ 1

KQRBvKQB.pgn lichess.org

Histogram: KQRB winning vs. KQB (log scale)

Longest KQRBvKQB phases

KQRBvKQB statistics (unique positions)

White wins:
255,057,420,229 (68.1%)

Frustrated white wins:
476,792 (0.0%)

Draws:
66,012,401,214 (17.6%)

Black wins:
53,593,900,747 (14.3%)

KQRBvKQB.json (?)

KQRBvKQB dependencies

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

KQBvKRB · KQRBvKB · KQBvKQB · KQRvKQB · KQRBvKQ

KQRBvKQB.txt KQRBvKQB.dot