Syzygy endgame tablebases

Black is winning with DTZ 23

KRBBvKRB.pgn lichess.org

Histogram: KRBB losing vs. KRB (log scale)

Longest KRBBvKRB phases

KRBBvKRB statistics (unique positions)

White wins:
207,981,795,936 (44.7%)
Frustrated white wins:
349,889,556 (0.1%)
Draws:
251,080,823,274 (54.0%)
Frustrated black wins:
50,228,916 (0.0%)
Black wins:
5,766,113,234 (1.2%)
KRBBvKRB.json (?)