[Retros] 'half' proof games

[Nicolas.Dupont at math.univ-lille1.fr]

Hi,

Noam's first example :

1 f3 ... 2 Kf2 ... 3 Ke3 ...#

is clearly right. But its second one :

1 f3 ... 2 g4 ... 3 fxe4 ...#

is dualistic (on the white side).

I would be very surprised if  "f3 Kf2 Ke3" is not the unique solution in 3.

Cheers;

Nicolas.