Syzygy endgame tablebases

Black is losing with DTZ 138

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

KRRBvKPP.pgn lichess.org

Histogram: KRRB winning vs. KPP (log scale)

Longest KRRBvKPP phases

KRRBvKPP statistics (unique positions)

White wins:
1,159,582,360,636 (97.5%)
Frustrated white wins:
48,474,892 (0.0%)
Draws:
19,692,297,772 (1.7%)
Frustrated black wins:
7,831,316 (0.0%)
Black wins:
9,711,435,056 (0.8%)
KRRBvKPP.json (?)