Syzygy endgame tablebases

White is losing with DTZ 171

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

KBNPvKBB.pgn lichess.org

Histogram: KBNP losing vs. KBB (log scale)

Longest KBNPvKBB phases

KBNPvKBB statistics (unique positions)

White wins:
403,112,436,450 (24.8%)
Frustrated white wins:
196,447,940 (0.0%)
Draws:
1,156,668,547,098 (71.1%)
Frustrated black wins:
20,621,054,086 (1.3%)
Black wins:
45,077,927,122 (2.8%)
KBNPvKBB.json (?)