Syzygy endgame tablebases

Black is losing with DTZ 255

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

KBBNvKRN.pgn lichess.org

Histogram: KBBN winning vs. KRN (log scale)

Longest KBBNvKRN phases

KBBNvKRN statistics (unique positions)

White wins:
94,196,449,608 (18.6%)
Frustrated white wins:
2,156,296,508 (0.4%)
Draws:
372,108,216,094 (73.6%)
Frustrated black wins:
16,957,338,699 (3.4%)
Black wins:
20,391,109,755 (4.0%)
KBBNvKRN.json (?)