[Retros] N-return discovered checkmate in 6.0

Noam Elkies elkies at math.harvard.edu
Thu Oct 26 11:30:33 EDT 2006

Meanwhile here's a captureless 6.0 move SPG (C+ Popeye in 0.1 sec.)
with 6...Nb8# discovering checkmate from the Bc8:

1 d3 d5 2 Kd2 Qd6 3 Ke3 Qc5+ 4 Kf4 Nd7 5 Kf5 f6 6 Ke6 Nb8#


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