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.


Histogram: KQBB winning vs. KRN (log scale)

Longest KQBBvKRN phases

KQBBvKRN statistics (unique positions)

White wins:
365,268,815,524 (83.0%)
Frustrated white wins:
4,853,430,324 (1.1%)
53,337,822,289 (12.1%)
Frustrated black wins:
11,705,712,773 (2.7%)
Black wins:
5,171,213,104 (1.2%)
KQBBvKRN.json (?)