Syzygy endgame tablebases

Invalid position

The given position is not a legal chess position.

Histogram: KRBB winning vs. KQ (log scale)

Longest KRBBvKQ phases

KRBBvKQ statistics (unique positions)

White wins:
2,350,565,700 (30.3%)
Draws:
3,882,463,509 (50.0%)
Frustrated black wins:
125,049,432 (1.6%)
Black wins:
1,400,809,507 (18.1%)
KRBBvKQ.json (?)

KRBBvKQ dependencies

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

KRBBvK · KBBvKQ · KRBvKQ

KRBBvKQ.txt KRBBvKQ.dot