On the afternoon of the championship, he lunched in Soho with a reporter from Vanity Fair magazine. Returning to Maida Vale, he purchased a house plant from the Clifton Nurseries and collected a parcel of shirts from his laundry in Elgin Avenue. After a brief nap, a prematch ritual, he showered and dressed for battle, departing his mews cottage a few minutes before six.

All of which explains why Grigori Bulganov, defector and dissident, was walking along London’s Harrow Road at 6:12 p.m., on the second Tuesday of January. For reasons that would be made clear later, he was moving at a faster pace than normal. As for chess, it was by then the last thing on his mind.

THE MATCH was scheduled for half past six at the club’s usual venue, the Lower Vestry House of St. George’s Church in Bloomsbury. Simon Finch, Grigori’s opponent, arrived at a quarter past. Shaking the rainwater from his oilskin coat, he squinted at a trio of notices tacked to the bulletin board in the foyer. One forbade smoking, another warned against blocking the corridor in case of fire, and a third, hung by Finch himself, pleaded with all those who used the premises to recycle their rubbish. In the words of George Mercer, club captain and six-time club champion, Finch was “a Camden Town crusty,” bedecked with all the required political convictions of his tribe. Free Palestine. Free Tibet. Stop the Genocide in Darfur. End the War in Iraq. Recycle or Die. The only cause Finch didn’t seem to believe in was work. He described himself as “a social activist and freelance journalist,” which Clive Atherton, the club’s reactionary treasurer, accurately translated as “layabout and sponge.” But even Clive was the first to admit that Finch possessed the loveliest of games: flowing, artistic, instinctive, and ruthless as a snake. “Simon’s costly education wasn’t a total waste,” Clive was fond of saying. “Just misapplied.”