13. Qf4+ ... Black is really gotten in a tough position in this game but finds Qf4+ to really improve the position in this game. This move wins the rook on h6, relieves the pressure being placed on the g6 knight, and really hellps to remove the irritating h7 pawn. Nice Work!
14. Qe6+ ... this move forks the bishop and the king, thus winning a free bishop.
15. Rxe6 ... There seems to be a few good moves for white in this position, but none looks better than Rxe6. This move wins a free rook. Be sure you see what happens if black takes the roook back with the king.