i think this is the best solutions in 3 moves. 1. Pd7 a. ... Bc6 / Bb7 / Bd5 /Bf3 / Bg2 / Bh1 2. Nd6 (threatening Nf7++) ... (Only Be8 will prevent ++ which is not possible) 3. Nf7++ b. ... Be4 (threatening Bxg6) 2. Qxe4 g6/g7 3. Qd4/d5 ++