Berlin GP: So and Fedoseev score crucial wins

Round 4 of the FIDE Grand Prix in Berlin saw three games ending decisively, each of them in a different group. Going into the rest day, three of the four pools have sole leaders — Hikaru Nakamura, Levon Aronian and Welsey So — while in pool B Radoslaw Wojtaszek and Vladimir Fedoseev (pictured) are sharing first place after the latter obtained a convincing victory over Grigoriy Oparin. | Photos. World Chess