Game 9, Anand–Carlsen, 0–1

Anand played a sharp line against the Nimzo-Indian Defence that gave him attacking chances.

Carlsen defended accurately, creating counterplay on the queenside, and ultimately queening his b-pawn with check while Anand was shifting his heavy pieces over to his mating attack.

Anand should have answered the check with

28.Bf1. ChessBase gives the best line as

28.Bf1 Qd1 29.Rh4 Qh5

(Black must sacrifice his new queen in order to stave off checkmate)

30.Nxh5 gxh5 31.Rxh5 Bf5

32.Bh3 Bg6 33.e6 Nxf6

34.gxf6 Qxf6 35.Rf5 Qxe6

36.Re5 Qd6,

Which is probably a draw.

Instead, Anand blundered

with  28.Nf1 and resigned

after 28...Qe1, since after 29.Rh4 Qxh4 30.Qxh4,

Black emerges a rook up.^[34]

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Game 9, Anand–Carlsen, 0–1

Nimzo-Indian Defence, Sämisch Variation (ECO E25)
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 exd5 8. e3 c4 9. Ne2 Nc6 10. g4 0-0 11. Bg2 Na5 12. 0-0 Nb3 13. Ra2 b5 14. Ng3 a5 15. g5 Ne8 16. e4 Nxc1 17. Qxc1 Ra6 18. e5 Nc7 19. f4 b4 20. axb4 axb4 21. Rxa6 Nxa6 22. f5 b3 23. Qf4 Nc7 24. f6 g6 25. Qh4 Ne8 26. Qh6 b2 27. Rf4 b1=Q+ (diagram) 28. Nf1 Qe1 0–1

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Game 10, Carlsen–Anand ½–½

Anand played the Sicilian Defence, but with 3.Bb5+ Carlsen avoided the sharpest main lines. Anand's 28...Qg5 was a mistake, allowing Carlsen to play 29.e5 with strong pressure on Black's d6-pawn. Maintaining the tension with 30.Nc3, 30.Ng3, or 30.b4 should have given White a winning game, but Carlsen erred with 30.exd6, releasing the tension and allowing Anand to recoup the pawn soon after. The players traded down to a knight endgame where White had some advantage, and Carlsen may have missed a win by playing 43.Nd6 instead of 43.Nd2.^[35] The game ended in a draw due to insufficient mating material.

Sicilian Defence, Canal–Sokolsky Attack (ECO B51)
1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Bxd7+ Bxd7 7. c4 Nf6 8. Bg5 e6 9. Nc3 Be7 10. 0-0 Bc6 11. Qd3 0-0 12. Nd4 Rc8 13. b3 Qc7 14. Nxc6 Qxc6 15. Rac1 h6 16. Be3 Nd7 17. Bd4 Rfd8 18. h3 Qc7 19. Rfd1 Qa5 20. Qd2 Kf8 21. Qb2 Kg8 22. a4 Qh5 23. Ne2 Bf6 24. Rc3 Bxd4 25. Rxd4 Qe5 26. Qd2 Nf6 27. Re3 Rd7 28. a5 Qg5 29. e5 Ne8 (diagram) 30. exd6 Rc6 31. f4 Qd8 32. Red3 Rcxd6 33. Rxd6 Rxd6 34. Rxd6 Qxd6 35. Qxd6 Nxd6 36. Kf2 Kf8 37. Ke3 Ke7 38. Kd4 Kd7 39. Kc5 Kc7 40. Nc3 Nf5 41. Ne4 Ne3 42. g3 f5 43. Nd6 g5 44. Ne8+ Kd7 45. Nf6+ Ke7 46. Ng8+ Kf8 47. Nxh6 gxf4 48. gxf4 Kg7 49. Nxf5+ exf5 50. Kb6 Ng2 51. Kxb7 Nxf4 52. Kxa6 Ne6 53. Kb6 f4 54. a6 f3 55. a7 f2 56. a8=Q f1=Q 57. Qd5 Qe1 58. Qd6 Qe3+ 59. Ka6 Nc5+ 60. Kb5 Nxb3 61. Qc7+ Kh6 62. Qb6+ Qxb6+ 63. Kxb6 Kh5 64. h4 Kxh4 65. c5 Nxc5 ½–½

With this draw, Carlsen won the World Championship match 6½–3½, becoming the new world chess champion.