A vast global game of geopolitical chess seemed to be hanging in the balance the morning I met with Garry Kasparov, the Russian chess genius whom many regard as the greatest player of all time.

Carlsen, considered arguably the best chess player of all time ... both players 10 minutes to make their moves without any chance to add additional time, increasing the chances of blunders ...

The move came four years after they sold the operation to five-time World Chess Champion Magnus Carlsen. Adam and Daniel Weissbarth outlasted one of the best chess players in the world.