Syzygy endgame tablebases

Black is losing with DTZ 112

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

KRRBBvKR.pgn lichess.org

Histogram: KRRBB winning vs. KR (log scale)

Longest KRRBBvKR phases

KRRBBvKR statistics (unique positions)

White wins:
454,248,829,562 (99.5%)
Frustrated white wins:
169,048 (0.0%)
Draws:
2,137,660,222 (0.5%)
Black wins:
307,254,132 (0.1%)
KRRBBvKR.json (?)