[Retros] Happy New Year!

Noam Elkies elkies at math.harvard.edu
Mon Dec 31 20:56:10 EST 2012

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How many legal games reach this position after White's 7th move?

www.janko.at/Retros/d.php?ff=rnb1kbr1/pppp1npp/5q2/4pp2/4BPP1/5NK1/PPPPP2P/RNBQ3R

(Hint: OEIS sequence A000111 <http://oeis.org/A000111> may help)

:-)

--NDE

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