Stefanos Pantazis, editor of The US Problem Bulletin, has sent me two problems that appeared in that journal and did win a prize there.
This is the solution of the second problem: You can also look at the first problem: a series selfmate in 17 moves.
This problem was composed by Michel Caillaud, was published in the US Problem Bulletin in 1994, and won a First Prize.
King c8; Bishop d4; Pawn b4, d7, e5, e7, f4, f7, h4, h7.
King a3; Rook f6, f8; Knight e8, g7; Bishop h8; Pawn b2, d2, e6, f5, h5.
Circe. h=4: Helpstalemate in four moves.
(b) Move the black king from a3 to a4, and solve the problem again.
= means promotion, e.g. 1.b1=B means that a black pawn promotes to a bishop; + means a check; rebirths are written between brackets, e.g., (Ng8) denotes a knight being reborn on g8. Turns are denoted as first the move of black, and then the move of white.