26.Rf1 Qe4 27.Rbe1?! (27.Rfe1! is more precise) 27...exd5!? Again correct was 27...Ref8 but Black could only count on a draw, so Karjakin bluffs.
28.Rxf2? A mistake after a mistake. White was winning after 28.Qc3.
29.Qd2?? We haven't seen Svidler blundering like that in this competition. White should have played 29.Qxe8 Qxf2+ 30.Kh2 Qxb6 31.Re7+ Kh6 32.Rd7 - Black has an extra pawn but White's compensation is excellent.
29...Rxf2 30.Qc3+ (30.Qxf2 Rxe1+) 30...d4 0-1
Soon after the game Karjakin tweeted a Chinese wisdom: "The temptation to quit will be the greatest just before you succeed."