csmath: 5. Nc3
[Nimzovich Attack, made popular recently again due to Svidler's win over Kramnik (2005) and Karjakin's win over Gelfand and Kramnik in Tal Memorial (2010). It allows opposite-side castling thus more aggressive white game.]
[This is Wang Hao's patent tried before in game with Nakamura in Norway earlier this year.]
[This Nakamura knight manouvre is not particularly beneficial to white.]
[New move with intention to attack bishop from h5. Nakamura played 12. h4.]
[Clearly a positional error but done with intention. This is how Wang Hao plays for better or worse.]
[Another misterious move only Wang Hao knows what for. White is now clearly with very serious advantage.]
[Suicidal attack that should have been the beginning of the end for black but exactly opposite happened.]
[Caruana's misterious move that is a serious waste of time which allows black to regroup the defence of his king.]
[This move makes sense but it was better to play 25. Rxd8 Rxd8, 26. Rd1 Ba6, 27. Qe1 Rd6, 28. Rxd6 cxd6, 29. Qd1 and white has clear advantage in ending due to exposed black king. Obviously g3 would stop any black plans on the queenside and black would have a hard time to save the game with his broken pawns on white squares. I would estimate this position likely lost for black.]
[Yet another error by Caruana. It was much better to play 28. gxh5 and pawn cannot be taken since 28. ...Qxh5?? 29. Bf7 immediately decides the game.]
[Wang just wants to complicate the game as he would be in serious danger of losing if only Caruana could make at least few moves without errors.]
[The last chance to keep serious advantage: 29. gxh5 Kxh5, 30. Bf7+ Kg4, 31. Qf1 Kf5, 32. Qh3+ Ke5, 33. h5 Kd6, 34. Qg3+ Kd7, 35. Rd1 Kc8, 36. Rxd8+ Kxd8, 37. Bc4 a5, 38. b3! looks hopeless for black.]
[32. gxh5 is certainly safer with likely draw.]
[Natural but also decisive error. 37. Qg7 gxf2, 38. Re5 Qxe5, 39. Qxe5+ Kg4, 40. Qe4 Kg3, 41 Qg6 Kh2, 42. Qc2 with repetition/perpetual. This is surely not easy to calculate but this necessity is the consequence of bad 32nd move of white which set the stage for the error in 37th move.]
[Hopeless, white is lost either way but this cannot help since black king easily escapes.]
[42. ...f1Q is stronger. But white is lost either way.]
[This is completely hopeless but the game is lost anyway.
In the sequel the game is finished with simple tactics with white paralized to the first rank.]
Absolutely horrid game by Caruana. He missed likely win and kept on missing varius natural moves until he boxed himself into "hard to find" draw which of course he could not find.
It is sad that such a fishy play by black has been rewarded with a full point. Wang Hao's opening is actually good but the followup is not. His utter disregard for the most elementary principles is actually entertaining to some degree.