India, April 2 -- The preparatory camps are over, prayers have been offered, the jet lag is wearing off and only a day separates Indian Grandmaster siblings R Vaishali and R Praggnanandhaa and the biggest tournament of their young careers so far. The Candidates in Toronto that will decide the challenger to the world chess champion will have their first rounds played out on April 4 (midnight IST). The first-ever brother-sister duo in the tournament's history is psyching themselves to summon their optimal states of mind. The siblings - aged 22 and 18 - arrived in Toronto a couple of days ago and have each other's back for last-minute pep chats and what-have-yous.

"It's a good opportunity for me.If I win it will be very good. I'll give it m...