Syzygy endgame tablebases

Black is losing with DTZ 101

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

KRPPPvKB.pgn lichess.org

Histogram: KRPPP winning vs. KB (log scale)

Longest KRPPPvKB phases

KRPPPvKB statistics (unique positions)

White wins:
924,387,691,032 (97.7%)
Frustrated white wins:
576 (0.0%)
Draws:
22,187,203,980 (2.3%)
Black wins:
29,071,446 (0.0%)
KRPPPvKB.json (?)