A handy lead has slipped through his grip but Indian Grandmaster D Gukesh will rely on his steely resolve to bounce back when he takes on enigmatic defending champion Ding Liren in the 13th game of the World Chess Championship that has been quite a roller-coaster ride for the players. The 18-year-old Gukesh, who is the youngest challenger to the title, and the 32-year-old defending champion from China have been locked in an intriguing battle in which both have held leads for not too long. They will resume on Wednesday after a day of rest.