csmath: 7. ...dxc4?!
[Very risky play by Kramnik though it is understandable that he plays for a win.]
10. ...N5b6
[...Bb4 11. Bxc4! and with threat Bxd5 black has nothing better than 11. ...Bxc3 12. bxc3 0-0 13. 0-0 Nxc3 14. Rfc1 and black strategy proves to be faulty. The control of diagonal h2-b8 is essential here.]
17. ... Nb6
[Black has achieved active game for a price of two pawns. He should be able to return one of the pawns but at the price of exchanges. Kramnik does something else.]
24. ...Nd7!?
[This retreat of knight leads to lost position although it is impossible to find any better plan.]
26. ...Qe8!?
[Position is already lost and Kramnik is simply powerless.]
28. ...Ng6
[...Rxc3 29. Rxc3 Rxc3 30. Qxa6 is simply hopeless.]
30. ...e5!
[Last attempt, protecting h-pawn and trying to muddy the position.
30. ...Nxh4 31. Bxh4 Qxh4 32. Rh1
is completely lost.]
31. Rh1?!
[Safe response. 31. dxe5 Nxh4 32. Bxh4 Qxh4 33. e6 wins as well.]
33. ...Qe8
[...Qxd5 34. exd5 Rxa3 35. e6! fxe6 36. Be5 with completely lost position.]
Karjakin forces exchange of queens anyway leaving black is lost ending.
37. ...Nd4?!
[...Ra8 was not attractive either but it was more resilient to attempt to stop a-pawn on a6.]
39. e6!
[Creating second passer and opening position for bishop. The game is now effectively over.]
The end is entertaining but never in doubt.
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Karjakin wins against opponent that took too much risk and could not prove his faulty strategy. Mirror image of his win against Svidler the round earlier.