[SetUp "1"] [FEN "3rnrk1/4qppp/p3pN2/1p2P3/8/P4RQ1/1PP3PP/4R2K b - - 2 24"] 24. Kh8 {Black can't take, as the simple recapture would win for White.} 25. Qh4 h6 26. Qe4 Nxf6 {The only way to defend is to dramatically weaken Black's king position.} 27. exf6 Qd6 28. Rd3 Qb6 29. fxg7+ Kxg7 30. Rg3+ Kh8 {And now Black is beaten with some spirited play.} 31. Qf4 e5 {Forced, to cover f6 and h6.} 32. Qxe5+ f6 33. Qh5 {Attacking h6 once more.} Qc7 {Black is tired of throwing white pawns to defend h6.} 34. Qxh6+ Qh7 35. Qf4 {Threatening to pin the queen.} Qxc2 36. Rh3+ {And now the king is systematically drawn into the open.} Kg8 37. Qg4+ Kf7 38. Qe6+ Kg7 39. Qe7+ {Black will soon be mated.} 1-0
No immediate win; I consider the puzzle to be finding Qh4 and Qe4.
In the fourth round:
Topalov to beat Svidler
Yi to beat Liren
Wojtasek to beat Giri
Vachier–Lagrave to beat So
Eljanov to beat Jakovenko
Caruana to beat Mamedyarov
Karjakin to beat Andreikin