Chess is booming. A heady cocktail of Queen’s Gambit mania, pandemic boredom, and Twitch streaming has given the ancient board game more visibility than it’s had in a long, long time. It’s been half a century, in fact, since the game last captured global attention so fiercely. Back in 1972, the USA’s Bobby Fischer and the USSR’s Boris Spassky engaged in a televised battle for the world...