Syzygy endgame tablebases

Black is losing with DTZ 160

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

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