[Retros] Fastest mate? :-)

Elkies, Noam elkies at math.harvard.edu
Sun Jun 11 11:47:18 EDT 2023


https://www.janko.at/Retros/d.php?ff=3Q4/pppP4/2PkPP2/nPp1p3/2B1P3/8/7B/R1K5

What's the fastest mate? :-)

(NDE 11.vi.2023, original but possibly anticipated --
all ingredients are known but I don't think I've seen this combination)

NDE

P.S. Lighter setting with a flight square but no retro:

https://www.janko.at/Retros/d.php?ff=3Q4/3P4/2pk4/2p1pP1R/8/7B/7B/R1K5


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