[Event "World Championship"] [Site "?"] [Round "11"] [White "Smyslov"] [Black "Botvinnik"] [Result "1-0"] [ECO "D90"] [Opening "Gruenfeld: Three Knights Variation"] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 {This, the Russian system of meeting the Grunfeld Defense has proven to be a most crucial test to Black's opening.} 5... dxc4 6. Qxc4 O-O 7. e4 Bg4 {Black plans on challenging the White center and therefore wants to put pressure on one of its supporters the White knight on f3.} 8. Be3 Nfd7 9. Rd1 {This is a direct consequence of the early deployment of the queen. Notice how strong the White center is, with virtually all of the forces devoted to its support.} 9... Nb6 10. Qb3 Nc6 11. d5 Ne5 12. Be2 Nxf3+ 13. gxf3 Bh5 {13...Bd7 would allow White's h-pawn to enter the attack for example 14.h4 Qc8 15.h5 when White has the initiative on the kingside.} 14. h4 Qd7 15. a4 { With the center under complete control, White can now squeeze the queenside.} 15... a5 16. Nb5 Nc8 17. Bd4 Nd6 {A mistake. Black should tie the White pieces down to the protection of the a- pawn with 17...Nb6. 17...Bxd4 18.Nxd4 Nb6 19. Bb5 Qd6} 18. Bxg7 Kxg7 19. Nd4 {A move made possible by the control of the center. This is a wonderful square for the knight.} 19... Kg8 20. Rg1 Qh3 21. Qe3 {White's queen heads over to attack Black's weak dark squares.} 21... c5 { The final mistake which allows White's queen to attack the weakened dark squares. 21...Qxh4 22.e5 Ne8 23.Qh6 Qh2 24.Rg3 Ng7 Offered some chances of a successful defense.} 22. dxc6 bxc6 23. Qg5 c5 {23...Kh8 24.Qxe7 Rad8 25. Qf6+ Kg8 26.Nxc6 With a material advantage and kingside attack in White's favor.} 24. Nc6 {Black resigned as White is threatening to win the bishop with Qxh5. 24.Nc6 Kh8 25.Qxe7 Rad8 26.Qf6+ Kg8 27.Ne7+ Mates.} 1-0