Take back and checkmate in one !

Yes, it is a mate in one... but not so easy.

This strange problem (published in a newspaper in Paris, 1932) was composed by Vladimir Navokov, dedicated to 25th anniversary as an elite player in the master-Russian Evgueni Znosko Borovski.

The statement of the problem is the following:
White takes back last movement and takes checkmate in one.

         
         The poet Vladimir Navokov

SOLUTION
There was a white pawn in d7, and it captured a black knight in c8, promotioning to rook.
Now, white takes back, and the pawn of d7 captures the rook of e8, promotioning to knight and takes checkmate.

                                                                                   Index of problems and studies on my blog

1. Qf6#

 Not.

The problem is "White takes back last movement and takes checkmate in one"

I love it !

That isn't mate on account of 1. ...Re6