Syzygy endgame tablebases

Black is winning with DTZ 3

KQvKRBN.pgn lichess.org

Histogram: KQ losing vs. KRBN (log scale)

Longest KQvKRBN phases

KQvKRBN statistics (unique positions)

White wins:
1,820,891,497 (22.8%)
Draws:
3,769,142,851 (47.2%)
Frustrated black wins:
1,436,216 (0.0%)
Black wins:
2,387,162,558 (29.9%)
KQvKRBN.json (?)

KQvKRBN dependencies

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

KRBNvK · KBNvKQ · KRNvKQ · KRBvKQ

KRBNvKQ.txt KRBNvKQ.dot