Michel Caillaud
1st Prize, Muñoz JT, Problemas 1989-91
Reciprocal helpmate in 3
b) Move the white king to e1
In this reciprocal helpmate Black starts and helps White to a position where Black can mate White on his third move, or play a different move which allows White to mate on his third move (as in a standard helpmate). Michel Caillaud’s light twin is an excellent example of the genre.