Syzygy endgame tablebases

White is losing with DTZ 172

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

KRBBvKQR.pgn lichess.org

Histogram: KRBB losing vs. KQR (log scale)

Longest KRBBvKQR phases

KRBBvKQR statistics (unique positions)

White wins:
54,896,675,596 (13.5%)
Frustrated white wins:
1,309,554 (0.0%)
Draws:
97,720,651,249 (24.0%)
Frustrated black wins:
2,183,973,519 (0.5%)
Black wins:
252,346,829,742 (62.0%)
KRBBvKQR.json (?)

KRBBvKQR dependencies

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

KRBBvKR · KQRvKBB · KRBBvKQ · KQRvKRB

KRBBvKQR.txt KRBBvKQR.dot