Since... 1994!

7. Find mate in 6 moves (8 chesscoins)

(White: Kg1, Qd5, Re1, Rf1, Bb3, a2, c3, e4, f2, g2, h2. Black: Kc7, Qf6, Ra8, Rg8, a6, c5, d7, e5, f7, h7.)

Black moves and mate in 6