[Retros] Andrew's remarkable homebase mate

Noam Elkies elkies at math.harvard.edu
Fri Nov 17 19:49:45 EST 2006

Andrew Buchanan <andrew at anselan.com> writes:

> rnbqkbnr/ppppppp1/8/8/4P3/3B4/PPPPNPP1/RNB3RK w KQkq - id 14;

correctly refraining from the usual practice of giving the solution,
and later satisfies Nicholas Dupont's request for a similar
"good trick!" on a1. Much the same works on h8: reverse colors
and replace Ne7 by Qc6, and it's SPG-8.5 (C+ Popeye, with some effort
-- it takes the program a few minutes to find the solution, and
1.5 hours to confirm it is unique!). There should also be an a8 version
but it might be beyond Popeye's range; how does Natch do with these?


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