[Event "Portoroz"] [Site "?"] [Round "0"] [White "Karpov"] [Black "Mariotti"] [Result "1-0"] [ECO "C64"] [Opening "Spanish: Classical, 4.O-O Qf6"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Qf6 { Black hopes to prevent a future d4 by White, but his queen is exposed on f6.} 5. c3 Nge7 {Black must play this move to avoid an immediate d4 by White. For example, see what happens in the following variation: 5...h6 6.d4 exd4 7. e5 Nxe5 8.Nxe5 Qxe5 9.Re1 and Black loses his queen because of the pin.} 6. b4 Bb6 7. Na3 g5 {Black believes that with the center closed for the time being he can get away with weakening his own kingside. He should have played a normal move like 7...a6 and followed up by d6 with a reasonable position.} 8. d4 { White wastes no time in punishing Black's eccentricity. The center will be torn open and Black's pieces will be kicked around.} 8... g4 {8...h6 9.Nc4 And Black will have to give up his pawn on e5 which will give White a huge edge in the central.} 9. Nxe5 Nxe5 10. dxe5 Qxe5 11. Qxg4 Qxc3 {After a series of exchanges White has emerged with a much better game. He has a great lead in development.} 12. Rb1 Rg8 {Do you see why White can't play 13.Qf3?} 13. Qh5 Qg7 {Black tries to gain time to coordinate his pieces by threatening mate on g2.} 14. g3 c6 15. Bd3 d6 16. Nc4 Bg4 17. Qh4 Nc8 18. e5 {White forces the center open. Black's king will perish in the ensuing crossfire.} 18... dxe5 { 18...d5 19.Nd6+ Nxd6 20.exd6 And the open e-file and threat of mate on e7 will doom Black's king.} 19. Bh6 Bd8 { 19...Qh8 20.Bg5 And White will follow up by Bf6 and Bxe5.} 20. Bxg7 Bxh4 21. Bxe5 f5 22. Na5 { Black is losing a pawn and his king is still not safe, so he gave up.} 1-0