Syzygy endgame tablebases

Black is losing with DTZ 108

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.

KRRRvKRN.pgn lichess.org

Histogram: KRRR winning vs. KRN (log scale)

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Longest KRRRvKRN phases

KRRRvKRN statistics (unique positions)

White wins:
389,078,673,105 (89.2%)
Frustrated white wins:
1,724,229 (0.0%)
Draws:
46,321,083,918 (10.6%)
Black wins:
674,346,516 (0.2%)
KRRRvKRN.json (?)

KRRRvKRN dependencies

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

KRRvKRN · KRRRvKN · KRRRvKR

KRRRvKRN.txt KRRRvKRN.dot