Chess is a war game fought mentally, but the strategies are the same as in the battles fought in olden times with the infantry and cavalry. The infiltration of the pieces into the enemy territory has to be timed perfectly so that it weakens the enemy ranks and causes damage either materially or positionally. Also, the route through which the pieces infiltrate has to be planned perfectly.
In the game which follows, both players indulge in some sharp exchanges in the Opening which leaves the King-side ruptured for both.  White manages to invade the enemy territory with his rook and this paves the way for his other pieces to join the attack and clinch the game in his favour.
White: Bela Badea (2530); Black: Ranko Szuhanek (2400)
Bucharest, 1998
Caro-Kann Defence
1. e4 c6. The Caro-Kann Defence.
2. Nf3 d5 3. Nc3 dxe4. The popular continuation here is 3. ... Bg4 which leads to a closed position.
4. Nxe4 Nf6 5. Nxf6+ gxf6 6. g3 Bg4. Here, Black could have considered 6. ... Qd5 7. d3 Qh5 8. Be3 Na6 9. Be2.
7. Bg2 e6. Worth a look is 7. ... Qd7 8. h3.
8. h3. If 8. b3 Nd7 9. Bb2 Bg7 10. h3 Bh5 11. Qe2 0–0 12. g4.
8. ... Bh5 9. d3 Rg8. Black could have concentrated on development with 9. ... Nd7.
10. Be3. If 10. Bf4 e5 and if 10. 0–0 f5.
10. ... Bb4+ Trying to create some weakness.
11. Kf1.
After both the Kingside pawns were ruptured, castling on the Kingside was always out of question. If 11. c3 Bd6 12. 0–0 12. ... f5 leads to an unclear position.
11. ... f5 12. Bf4 Nd7. If 12. ... Bd6 13. Qd2 Bxf3 14. Bxf3 Bxf4 15. Qxf4 Nd7 16. g4.
13. c3 Be7. If 13. ... Bd6.
14. d4 Nf6 15. Qb3 Nd5. A good square for the knight. If 15. ... Qb6 16. Ne5.
16. Bd2. If 16. Qxb7 Nxf4 17. Qxc6+ Kf8 18. gxf4 Rc8 19. Qb7 Rb8 20. Qxa7 Rxb2 leads to an unclear position.
16. ... Qb6. An invitation to swap queens. If 16. ... Bxf3 17. Bxf3 Qb6 18. g4 and White looks better.
17. Ne5 f6 18. Qxb6. If 18. Nc4 Qc7 19. Re1 Kf7.
18. ... axb6 19. Nd3 b5 20. a3 Nb6. Doesn’t look like a good move as the Knight looked more powerful on the square where it was placed.
21. Re1 Nc4 22. Bc1 Kd7 23. g4. A good move!
23. ... fxg4. If 23. ... Bg6 24. Nf4.
24. Nf4 Bf7. If 24. ... gxh3 25. Bxh3 Bg4 26. Bxg4 Rxg4 27. Nxe6.
25. hxg4 Rg7. If 25. ... Rxg4 26. Rxh7 (and if 26. Bh3 Rg7 27. Nxe6 Bxe6 28. Bxe6+ Kc7 29. Bf5). 26. ... Bg8 27. Rh8 Nxb2 28. Bh3 Rxf4 29. Bxf4 Nd3 30. Rxg8.
Diagram 1
26. Rh6. Moving into enemy ranks.
26. ... Bd6. If 26. ... Re8 27. Nh5 Bxh5 28. Rxh5 Rxg4 29. Bh3.
27. Rxf6. Grabbing the pawn. If 27. Nh5 Bxh5 28. Rxh5.
27. ... Be7 28. Rh6 Bg5 29. Nxe6.
A good move. If 29. Rh1 Nxb2.
29. ... Bxh6. A big blunder. The correct continuation is 29. ... Bxc1 30. Nc5+ Kc7 31. Rxc1 (31. Re7+ Kd8 32. Rd7+ Ke8 gives advantage to black) 31. ... Nxb2 32. Nxb7.
30. Nc5+ Kd6.
Another wrong move, but then black is anyway in trouble and is not helped either by 30. ... Kc7 31. Bxh6 Rg6 32. Bf4+ Kd8 (32...Kb6 33.Re7) 33. Nxb7+ Kc8 34. Re7 with White dominating but perhaps Black can offer better resistance with 30. ... Kd8 31. Bxh6 Rg6 32. Bf4 (and not 32. Nxb7+ Kc8 33. Bf4 Kxb7! 34. Re7+ Kb6 35. Rxf7 Nxb2) 32. ... Ra7 33. Bb8 Ra8 34. Bg3.
31. Bxh6. Making sure that the game is going his way.
31. ... Rxg4. If 31. ... Rg6 32. Bf4+
32. Nxb7+ Kc7. If 32. ... Kd7 33. Bh3. 33. Re7+ Kb6 34. Rxf7 Rag8 35. Nc5 Nd6. If 35. ... Rxg2 and White provides the finishing touches with 36. Rb7+ Ka5 37. b4 checkmate.
36. Rd7 Rxg2 37. Rxd6 Rg1+ 38. Ke2 b4 39. Rd7 Rb8 40. Bf4 bxa3 41. Bxb8 and Black resigned in this hopeless position.

Diagram 2
White to play and win
1. Qd8 Qf7 2. Rh3 Nd7 3. Qxa8 e5 4. Rdh1 Nf8 5. Rh8+ Kg7.
6. Qd8 Bc6 7. Qg5 and White wins easily.