Saturday, July 09, 2016

[isroiojg] Seemingly drawable losing positions

Compose a chess position which seems at least drawable to a human on cursory analysis but which is actually losing.  The human should not notice that some line is "uncertain".

This is a rare type of chess problem, but it could be constructed from a similar and common type, the seemingly drawn position which is actually winning.  Take one of those positions and, if possible, go one ply retrograde while not destroying the outcome.

Could be a contest: a human is asked to classify positions as won, lost, or drawn, also permitting expressing degree of certainty (perhaps as odds).

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