Polina Shuvalova is set to be crowned the girls’ champion in the World junior chess championship. Polina battled to a 66-move win over Ukraine’s Mariia Berdnyk while displaying her uncompromising approach in squeezing out a win from a seemingly drawn position. In the open section, Ukraine’s Evgeny Shtembuliak retained his half-point lead after the top two boards ended in draws. …