[Retros] More than three, less than five

Joost de Heer joost at sanguis.xs4all.nl
Sat May 1 03:43:13 EDT 2010

On 05/01/2010 08:34 AM, Hans wrote:

> Where can I find (or what is) the soultion of N21. N.Plaksin ?

[very fast analysis]
1.OO! Retraction requires the black king to go to c1, then the bishop
goes to c8 and b7-b6 can be retracted. The whole retraction requires
more than 100 halfmoves.


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