[Retros] Re: e.p. problem

[Francois Perruchaud]

In 2002, I composed this joke :
Black is mate, but white allows him a posteriori to capture e.p. 
I don't know if we can say that black has only one move. 
He has certainly less than one move ! Maybe 0.5 ;-)

3N4/p1Nppp2/1p1B4/kP6/pP6/r1P2P2/b5PP/1B2K2R
White:Ke1,Nc7,Nd8,Bb1,Bd6,Rh1,Pb4,b5,c3,f3,g2,h2 /
Black:Ka5,Ba2,Ra3,Pa4,a7,b6,d7,e7,f7
(12 + 9)
Helmate in 2 - a posteriori

Black is mate, but
1.axb3 ep O-O (proving a posteriori that last move was not b3-b4) 2.Ta4 Cb7
and mate again.

François Perruchaud