A pawn promotion is a huge event in a chess game, as the energy garnered by the pawn advancing up the board is transformed in a most un-Einsteinian way (surely a pawn’s advance doesn’t create that much energy) into serious amounts of matter. Star columnist Jon Speelman looks at overwhelming pawn avalanches, and analyses a game in which Albert Einstein got the better of Robert Oppenheimer. | Pictured: Albert Einstein and Robert Oppenheimer in 1947