[Retros] About T.Orban problem; Yefim's letter 01/12/2005
sethb at panix.com
Tue Jan 11 21:15:22 EST 2005
Nicolas.Dupont at math.univ-lille1.fr wrote:
> Question : is it possible to go one step further ? that is several
> solutions in N and N+1 moves, but only one solution in N+2 moves ?
No. Start by popping a knight out and back; that turns any solution
in N moves into 16 solutions in N+2 moves.
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