Originally posted by Mephisto2You were quick of the mark matey.
Checkmate in 4:
1.Qf5! threatens Nf4#; only three moves to stop that
a) 1. ... Bxd5 eliminating the knight
b) & c) 1. ... Qb8 or 1. ... Bd6, covering f5
After each of these, the second threat 2.Rxg4! is deadly
a) 2.Rxg4 any move 3.Rh4#
b) & c) 2.Rxg4 Qxg3+ (or Bxg3) 3.fxg3 any move 4.Rh4#