The pin is one of the tactics of chess. In a game of speed chess versus Texascanyon of the USA, I used the pin to win the game. In this game, Texascanyon played black. Here are the moves of the game along with my commentary:
1. e4 e5
2. Nf3 c6
Black's second move is not common. The c6 square is often used for the knight.
3. Bc4 d6
Black has yet to develop a piece.
4. d4 exd
5. Nxd4 d5
I have a clear lead in development.
6. exd cxd
7. Bb5+ Bd7
8. Qe2+ Be7
The king bishop is pinned.
9. 0-0 Nf6
10. Nf5 Bxb5
Black cannot castle because this would lose a piece.
11. Qxb5+ Nc6
Now the queen knight is pinned.
12. Nxg7+ Kf8
The check takes away black's right to castle.
13. Nf5 Rg8
14. Bh6+ Ke8
15. Re1 Ne4
The knight breaks the pin on the bishop.
16. f3 Bc5+
Black wants to play actively but the check is a blunder. The reason is that the knight is now pinned. A better move for black is to move the knight.
My queen is immune to capture because of the pin on the knight. With this move, I am up a piece and black decides to resign.
The pin is a very effective tactical tool at the chess player's disposal. In this game, I use the pin to disrupt my opponent's plans and find a path to victory. In fact, my final move succeeds because of the pin on the black knight.