Anderssen, A - 'Immortal Game'

[Event "?"]
[Site "London"]
[Date "1851"]
[Round "?"]
[White "Anderssen, A."]
[Black "Kieseritsky"]
[TimeControl "0/0"]
[Result "1-0"]
[ECO " "]

{One of Anderssen's masterpieces, known as the "Immortal Game." Black neglects his development, and Anderssen offers both Rooks to show that two active pieces are worth a dozen sleeping at home.}
1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 b5 5.Bxb5 Nf6 6.Nf3 Qh6 7.d3 Nh5 8.Nh4 Qg5 9.Nf5 c6 10.Rg1 cxb5 11.g4 Nf6 12.h4 Qg6 13.h5 Qg5
14.Qf3
{Now threatening to trap the Black Queen with 15.Bxf4.}
14...Ng8 15.Bxf4 Qf6 16.Nc3 Bc5 17.Nd5 Qxb2 18.Bd6
{A brilliant move, the main point of which is to divert the Black Queen from the a1-h8 diagonal. Now Black cannot play 18...Bxd6? 19.Nxd6+ Kd8 20.Nxf7+ Ke8 21.Nd6+ Kd8 22.Qf8++.}
18...Qxa1+ 19.Ke2 Bxg1
{ And not 19...Qxg1 20.Nxg7+ Kd8 21.Bc7++.}
20.e5 Na6
{More resistance could have been offered by 20...Ba6, but White should still win after 21.Nc7+ Kd8 22.Nxa6 Bb6 23.Qxa8.}
21.Nxg7+ Kd8 22.Qf6+ Nxf6 23.Be7# 1-0