Sorry, Selfmate in TWO
The white queen plays no role in the mate?
It stops the pawn from advancing, forcing the mate.
qf4 is mate...
1.Qf4# ?I guess i don't get the tactics..!
This is a SELFMATE in 2. It means that you are trying to make the moves that force black to checkmate you against your will.
*Against his will
This is not a mate in 1 problem.
1.Bg1 a5 2.Qa4 d2#
Sorry, Selfmate in TWO