[Retros] Typo correcton re 50-move joke (Was illegal GM moves)

Noam Elkies elkies at math.harvard.edu
Wed May 11 17:05:15 EDT 2011

Oops -- I wrote

> 9...Ka4 10 Ke7 etc. Black can choose to finish with (48 Kg8 Qg6+ 49 Kf8)

> Ke5 50 Ke7 Qd7+ 51 Ke8 Ke6! and then the only move to complete the

> 50-count is 52 Nc2!, ironically the same suicidal play that might have

> undone White 43 moves earlier.

but of course 50...Qd7+ is neither possible nor desirable, and I meant
50...Qd6+. (After the more natural 50...Qe6+ 51 Kf8 Kf6 White could
also play 52 Kg8, and likewise 50...Qg7 51 Ke8 Qe6 allows 52 Kd8.)


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