Chess is war. In war it is advisable to fight when and where you have a stronger force and the same applies in chess. If you’ve got the better game in a particular area of the board then this is where you should fight, and Paul Morphy does so in the following game:
Paulsen,Louis – Morphy,Paul
1. e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5 5.0–0 0–0 6.Nxe5
Q: What is Nxe5 aiming for?
A: This is a fork trick, used to get the better center in opening phase. A better example is 1. e4 e5 2. Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Nxe4 5.Nxe4 d5 getting the material back with a nice game.
It would have been better to play 7.Nf3! Nxe4 8.Nxe4 Rxe4 9.d3 Re8 10.d4 when white develop with ease.
7…dxc6 8.Bc4 b5
Q: Instead of text move, is it advisable to take on e4?
A: No, because of 8…Nxe4? 9. Nxe4 Rxe4 10.Bxf7+ Kxf7 11.Qf3+ etc.
Q: Is Bb3 playable, with the same idea?
A: No, Black can generate very dangerous play against white’s queen with 9.Bb3? Bg4 10.Qe1 b4 11.Nd1 Nxe4.
10.Bf3 loses immediately to 10…Nxf2 11.Rxf2 Qd4 12.Ne4 (12.Qf1 Qxf2+ 13.Qxf2 Re1#) 12…Rxe4 13.Bxe4 Qxf2+ 14.Kh1 Bg4 15.Bf3 Re8–+, as given in Chessbase.
10…Rxe4 11.Bf3 Re6 12.c3?
Q: Why is c3 a bad move?
A: It allows Black to hinder White’s development. The course of the game shows why.
12…Qd3! 13.b4 Bb6 14.a4
In a cramp positions it is advisable to exchange a few pieces. 14.Re1 Rxe1+ 15.Qxe1 Bd7 16.Qf1 was better.
14…bxa4 15.Qxa4 Bd7
It is better to play 15… Bb7 in order to prevent exchange of queens.
16.Qa6 would have been better.
With this move, Black clearly gets his pieces into superior positions.
The element of surprise. You can win the battle if you know where to fight.
18.gxf3 Rg6+ 19.Kh1 Bh3 20.Rd1 Bg2+ 21.Kg1 Bxf3+ 22.Kf1 Bg2+
Find the quicker way to finish than Bg2+.
Now Be4 – leads to mate in 3
Bf3 – leads to mate in 4
Bh3 leads to mate in 5
23…Bh3+ 24.Kh1 Bxf2?
Still winning but far from delivering checkmate. Find a better continuation than this.
25.Qf1 Bxf1 26.Rxf1 Re2 27.Ra1 Rh6 28.d4 Be3
That pockets a rook. How?
Note: If you’ve get Chessbase, you can find this game with lots of detailed variations. But it is advisable to solve it at your own way!