Syzygy endgame tablebases

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)

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Longest KRBPPvKR phases

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 (?)

KRBPPvKR dependencies

To probe all KRBPPvKR positions, these tables and their transitive dependencies are also required:

KQRBPvKR · KRRBPvKR · KBPPvKR · KRBPPvK · KRBBPvKR · KRPPvKR · KRBNPvKR · KRBPvKR

KRBPPvKR.txt KRBPPvKR.dot