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.

KRBBBvKR.pgn lichess.org

Histogram: KRBBB winning vs. KR (log scale)

Longest KRBBBvKR phases

KRBBBvKR statistics (unique positions)

White wins:
451,338,323,736 (95.9%)
Frustrated white wins:
34,958,040 (0.0%)
Draws:
19,106,608,944 (4.1%)
Black wins:
330,235,446 (0.1%)
KRBBBvKR.json (?)