Since... 1994!

Help-mate in 5 moves

R. Smullyan

(White: Kg5, Qb6, Re1, Nd7, Nh1, Be2, Bg7, c2, c3, d2, h4, h6. Black: Kd4, Rg8, Bc1, Be8, d5, e7, f2, f3, g6, h5)

Help-mate in 5 moves

Solution