Syzygy endgame tablebases

Invalid position

The given position is not a legal chess position.

Histogram: KQB winning vs. KQR (log scale)

Longest KQBvKQR phases

KQBvKQR statistics (unique positions)

White wins:
1,371,933,194 (20.3%)
Draws:
2,182,749,706 (32.4%)
Frustrated black wins:
40,068 (0.0%)
Black wins:
3,190,249,626 (47.3%)
KQBvKQR.json (?)

KQBvKQR dependencies

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

KQRvKB · KQBvKR · KQBvKQ · KQRvKQ

KQRvKQB.txt KQRvKQB.dot