Syzygy endgame tablebases

Black is losing with DTZ 118

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

KRRBvKBB.pgn lichess.org

Histogram: KRRB winning vs. KBB (log scale)

Longest KRRBvKBB phases

KRRBvKBB statistics (unique positions)

White wins:
408,449,844,350 (87.9%)
Frustrated white wins:
138,441,132 (0.0%)
Draws:
56,042,080,000 (12.1%)
Black wins:
133,397,804 (0.0%)
KRRBvKBB.json (?)