After three rounds Sam Shankland is the sole leader in the Masters tournament at the Prague Chess Festival. With 2.5/3 he is half a point ahead of Nijat Abasov and Radoslaw Wojtaszek, but in round 4 Shankland plays with Black against Wojtaszek and has to defend his lead. The round starts at 15:00 CEST (9:00 ET, 13:00 UTC). Follow the games live.