A classic win by Pillsbury over Winawer back in 1896. He has in beloved knight on e5 and Black seems to have nipped a pawn on c5 because if the bishop is taken, he loses that knight. However, Pillsbury has other ideas.
This is quite a long mating attack. Study it BEFORE you look at the solution and see if you can see all the variations below as well. 1.Bxh6 Bxd4 The point is that now Pillsbury’s bishop can't be taken! 1...gxh6 2.Qg3+ Kh8 3.Ng6+ wins the queen. 2.Qxd4 gxh6 3.Qf4 Threatening to win the queen again. 3...Nd5 4.Qxh6 f6 The knight on e5 is protected by this well-known mating pattern: 4...Qxe5 5.Bh7+ Kh8 6.Bg6+ Kg8 7.Qh7+ Kf8 8.Qxf7# 5.f4 Re7 Black still can't take the knight! 5...fxe5 6.Qg6+ Kf8 7.fxe5+ Ke7 8.Qg5+ Kd7 9.Rf7+ Re7 10.Rxe7+ Nxe7 11.Rd1+ Nd5 12.Qg7+ Kd8 13.Qf8+ Kd7 14.Rxd5+ cxd5 (14...exd5 15.Bf5#) 15.Ba4+ 6.Ng6 Black Resigned as he can see the mate coming: 6...Rh7 [6...Rg7 7.Qh8+ Kf7 8.Qf8#; 6...f5 7.Qf8+ Kh7 8.Rf3 Rg7 9.Rg3 Qf7 (9...Rxg6 10.Rh3+ Rh6 11.Rxh6#) 10.Qh8#]7.Qf8#