Since... 1994!

13. Find mate in 6 moves (8 chesscoins)

Havel.

(White: Ke2, Qe1, Ra1, Rh1, Bf4, Bf7, Ne5, a3, c4, g2, g3. Black: Kh8, Qe7, Ra8, Rd8, Bf5, Nd7, Ne4, a6, c7, g7, h7.)

White moves and mate in 6