Selfmate

If White can leave Black with no option but to play Bxg2#, the problem is solved.

There are two variations: Note that only a promotion to a knight works on move one: any other piece would be able to interpose after 1...Bxg2+.

[3] The puzzle is based on a 1922 342-move composition by Ottó Titusz Bláthy, which was later found to be cooked.

A derivative of the selfmate is the reflexmate, in which White compels Black to give mate with the added condition that if either player can give mate, they must (when this condition applies only to Black, it is a semi-reflexmate).

Another variation is the series-selfmate, a type of seriesmover in which White makes a series of moves without reply, at the end of which Black makes one move and is compelled to give mate.