Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Black is losing with DTZ 429
Ke6
Loss with DTZ 428
Rf4
Loss with DTZ 154
Kg6
Loss with DTZ 126
Kg5
Loss with DTZ 93
Ke5
Loss with DTZ 13
Ke4
Loss with DTZ 1
Kg4
Loss with DTZ 1
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KRBNvKRN.pgn
lichess.org
Histogram: KRBN winning vs. KRN (log scale)
Longest KRBNvKRN phases
KRBN winning with DTZ 100
KRBN winning with DTZ 430 (frustrated)
KRBN losing with DTZ 129 (frustrated)
KRBN losing with DTZ 25
KRBNvKRN statistics (unique positions)
White wins:
237,224,993,292 (48.5%)
Frustrated white wins:
56,964,246,083 (11.6%)
Draws:
183,550,192,470 (37.5%)
Frustrated black wins:
1,955,054,802 (0.4%)
Black wins:
9,479,409,777 (1.9%)
KRBNvKRN.json
(?)