(Photo taken from the official site)
The 4th round was marked by interesting games and lots of missed chances! The surprise of the round was perhaps the miniature played between Topalov and Ivanchuk (21 moves). At first it looked like Black was fine and indeed he was, but then Ivanchuk decided not to castle and this is when Topalov made some very strong and nice moves and forced Black to resign due to huge material loss!
Results of the 4th round
GM Grischuk Alexander 2779 ½ – ½ GM Bacrot Etienne 2725
GM Morozevich Alexander 2760 ½ – ½ GM Nakamura Hikaru 2775
GM Caruana Fabiano 2774 ½ – ½ GM Kasimdzhanov Rustam 2699
GM Dominguez Perez Leinier 2723 1 – 0 GM Svidler Peter 2769
GM Topalov Veselin 2793 1 – 0 GM Ivanchuk Vassily 2755
GM Kamsky Gata 2741 ½ – ½ GM Ponomariov Ruslan 2742
Standings after the 4th round
1 GM Dominguez Perez Leinier 2723 CUB 2½
2 GM Kamsky Gata 2741 USA 2½
3 GM Kasimdzhanov Rustam 2699 UZB 2½
4 GM Grischuk Alexander 2779 RUS 2½
5 GM Topalov Veselin 2793 BUL 2½
6 GM Caruana Fabiano 2774 ITA 2½
7 GM Morozevich Alexander 2760 RUS 2½
8 GM Ponomariov Ruslan 2742 UKR 2
9 GM Svidler Peter 2769 RUS 1½
10 GM Bacrot Etienne 2725 FRA 1½
11 GM Nakamura Hikaru 2775 USA 1
12 GM Ivanchuk Vassily 2755 UKR ½
Today is the 1st rest day!
Tomorrow’s pairings (5th round)
GM Ponomariov Ruslan 2742 – GM Grischuk Alexander 2779
GM Ivanchuk Vassily 2755 – GM Kamsky Gata 2741
GM Svidler Peter 2769 – GM Topalov Veselin 2793
GM Kasimdzhanov Rustam 2699 – GM Dominguez Perez Leinier 2723
GM Nakamura Hikaru 2775 – GM Caruana Fabiano 2774
GM Bacrot Etienne 2725 – GM Morozevich Alexander 2760