1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 e6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5 9. Be2 Bb7 10. O-O Nbd7 11. Ne5 Bg7 12. Nxf7!?

This sacrifice sent shockwaves around the chess world when it was first played by Topalov against Kramnik at Wijk aan Zee earlier this year.

A more usual continuation is something like 12. Nxd7 Nxd7 13. Bd6

12... Kxf7 13. e5 Nd5 14. Ne4 Ke7 15. Nd6 Qb6 16. Qc2

A deliberate novelty or just the wrong move order as intimated by GM Patrick Wolff from San Francisco?

16. Bg4 Raf8 17. Qc2 Qxd4 (17... Rhg8 18. a4 Ba8 19. Rfe1 Nc7 20. d5 cxd5 21. axb5 a5 22. b3 cxb3 23. Qh7 d4 24. Bh5 Nxb5 25. Nf7 b2 26. Rab1 Nc3 27. Nxh6 Rh8 28. Qxg7+ Kd8 29. Nf7+ Kc7 30. Nxh8 Nxb1 31. Ng6 Rd8 32. h4 Nd2 33. hxg5 b1=Q 34. Rxb1 Qxb1+ 35. Kh2 Nf1+ 36. Kh3 Ne3 37. fxe3 Qh1+ 38. Kg4 Qxg2 39. Qf7 dxe3 40. Nh4 Qe4+ 41. Qf4 a4 42. Bf7 Nc5 0-1 Timman,J (2561)-Ljubojevic,L (2543)/Wijk aan Zee 2008) 18. Qg6 Qxg4 19. Qxg7+ Kd8 20. Nxb7+ Kc8 21. a4 b4 22. Rac1 c3 23. bxc3 b3 24. c4 Rfg8 25. Nd6+ Kc7 26. Qf7 Rf8 27. cxd5 Rxf7 28. Rxc6+ Kb8 29. Nxf7 Re8 30. Nd6 Rh8 31. Rc4 Qe2 32. dxe6 Nb6 33. Rb4 Ka8 34. e7 Nd5 35. Rxb3 Nxe7 36. Rfb1 Nd5 37. h3 h5 38. Nf7 Rc8 39. e6 a6 40. Nxg5 h4 41. Bd6 Rg8 42. R3b2 Qd3 43. e7 Nf6 44. Be5 Nd7 45. Ne6 1-0 Topalov,V (2780)-Kramnik,V (2799)/Wijk aan Zee 2008

16... Qxd4!

Not the most obvious move to the untrained eye as it just leaves the bishop on b7 totally en prise. However Jorge's thinking was that there probably had to be a reason that 16.Bg4 was usually played before moving the queen to c2.

17. Rad1

17. Nxb7 Bxe5 18. Bxe5 (18. Na5 Qb6 19. Bxe5 Nxe5 20. b4 Rad8 (20... Nxb4?! 21. Qc3 Qxa5 22. Qxe5 Nd5 23. Bg4) 21. Qe4 Kf6 White's knight is out of play compared to other lines.) 18... Nxe5 19. Rad1 Qb6 20. Qe4

17... Qb6 18. Qg6 Bxe5

18... Rag8? 19. Bg4 Nc5 20. Bxe6! Nxe6 21. Qf7+ Kd8 22. Nxb7+ Kc8 23. Nd6+ Kb8 24. Qxe6

19. Bg4 Nf8

This move gives up the exchange but Black feels he will still have enough of a material advantage to balance out his positional defects.

19... Kxd6 was the move advocated online but it appears it is only good enough for a draw although White certainly has to prove it 20. Qxe6+ Kc5 (20... Kc7? 21. Bxe5+ Nxe5 22. Qxe5+ Kd8 23. Qd6+ Ke8 24. Bh5#) 21. Bxe5 Nxe5 22. Rxd5+! (22. Qxe5 Rae8) 22... cxd5 23. b4+!! leads spectacularly to a draw but other moves allow Black to consolidate his material advantage 23... cxb3 (23... Kd4 24. Rd1+ Kc3 25. Qxe5+ Kxb4 26. Qb2+ Kc5 27. Qd4+ Kd6 28. Qf6+=) 24. Qxe5 Qd8 25. Rc1+ Kb6 (25... Kb4? 26. Qc3+ Ka4 27. axb3+ Ka3 28. Ra1#) 26. Qd4+ Ka6 27. axb3 Bc8 28. Qa1+ Kb6 29. Qd4+ Ka6=

20. Qf7+

20. Nf5+ This was the move mentioned by Jorge in his video interview given after the game. It's a scary sacrifice, and one I'm sure that GM Shabalov must have considered. Black has to tread very carefully to avoid many pitfalls. 20... exf5 (20... Kd8 Black can also just ignore the sacrifice and should be ok 21. Qf7 Qc7! 22. Nxh6! Qe7! 23. Bxe5 Rxh6) 21. Qxf5 Bf6 (21... Bxg3 22. hxg3 Bc8 23. Rfe1+ Kd8 24. Qf6+ Kc7 25. Qe5+ Kb7 26. Bxc8+ Rxc8 27. Qxh8) 22. Be5 Rh7 23. Bxf6+ Nxf6 24. Rfe1+ Kf7 25. Bh5+ Kg8 26. Qxf6 Qc7 and Black has held off the attack and should go on to win with his material advantage.

20... Kxd6 21. Bxe5+ Kxe5 22. Qg7+ Kd6 23. Qxh8 Qc7

23... Qd8 leads to the game, however

23... Qa5 was an alternative that needed calculating 24. Qxh6 Qxa2 25. f4! Qxb2 26. fxg5 leads to a very complicated position involving opposite side pawn races.

24. Qxh6 Qe7 25. Rfe1 Rd8 26. f4

White starts immediate action on the kingside and against the exposed Black king.

26... gxf4 27. Qxf4+ Kd7

27... e5!? 28. Qe3 Ng6 and the best White may have is to trade pieces, which he certainly doesn't want to do 29. Qa3+ Kc7 30. Qxe7+ Ndxe7 31. Rxd8 Kxd8 32. g3 c5

28. Qf2 Kc7

Freeing the knight on d5 for action.

29. Qxa7?!

Given what happens upon capture of the a-pawn, White may have considered a move like 29. a4 a6 and then something like 30. h4 in an attempt to get counterplay with the kingside pawns.

29... Ra8

The Black rook becomes very active.

30. Qd4 Rxa2 31. Rf1 Nd7 32. Kh1 c5

32... c3! seems even better 33. bxc3 Ra4

33. Qf2

33. Qe4 Rxb2 34. Bxe6 N5f6 35. Qf4+ Kb6 36. Rd6+ Bc6 all Black's pieces support each other and his pawn mass on the queenside should easily win the game for him.

33... N7f6 34. Bf3 c3 35. Qg3+ e5 36. bxc3

36. Rfe1 cxb2 37. Rxe5 Qd6

36... Ne3 37. Bxb7 Nxd1 38. Qf3

38. Rxd1 Kxb7

38... Nf2+!

Trading everything off and leaving a won ending a piece up.

39. Rxf2 Ra1+ 40. Rf1 Rxf1+ 41. Qxf1 Kxb7 42. Qxb5+ Kc7 43. Qa5+ Kd7 44. Qb5+ Ke6 45. Qc4+ Kf5 46. h3 e4 47. Kg1 e3 48. Kf1 Qd6 49. Qe2 Qf4+ 50. Ke1 Qg3+ 51. Kd1 Qf2 52. Qd3+ Ke5 0-1