[Retros] About T.Orban problem; Yefim's letter 01/12/2005

Nicolas.Dupont at math.univ-lille1.fr Nicolas.Dupont at math.univ-lille1.fr
Tue Jan 11 16:39:31 EST 2005

Happy new year everybody !

It should be noticed that the following "mirror problem" shows the same
paradox without any question about the right of castling.


a) spg in 3 moves, 4 solutions

b) (exact) pg in 4 moves



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