Syzygy endgame tablebases
White to move
Black to move
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Black is losing with DTZ 122
Ka8
Loss with DTZ 121
Ka6
Loss with DTZ 1
Kc6
Loss with DTZ 1
Ra8
Loss with DTZ 1
Rb8
Loss with DTZ 1
Rd8
Loss with DTZ 1
Re8
Loss with DTZ 1
Rf8
Loss with DTZ 1
Rg8
Loss with DTZ 1
Rh8
Loss with DTZ 1
Kxa7
Zeroing
Rxc7
Zeroing
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KRBPPvKR.pgn
lichess.org
Histogram: KRBPP winning vs. KR (log scale)
⋮
Longest KRBPPvKR phases
KRBPP winning with DTZ 77
KRBPP winning with DTZ 123 (frustrated)
KRBPP losing with DTZ 19
KRBPPvKR statistics (unique positions)
White wins:
1,087,107,960,184 (93.4%)
Frustrated white wins:
565,034 (0.0%)
Draws:
74,426,600,674 (6.4%)
Black wins:
2,805,481,968 (0.2%)
KRBPPvKR.json
(?)