GG Ivanov

Alexander Ivanov designs railway signalling for the Russian network, the fail-safe interlockings that ensure two trains never argue over one track, and has spent twenty years being professionally intolerant of ambiguity. His take points are exact and every cube is treated as a design with one correct answer. None of it has yet solved his father-in-law, who taught him the game, plays on pure feel, refuses to discuss any of it, and remains narrowly ahead across sixty years of Sunday afternoons. The rematch is a standing appointment. Ivanov has stopped being gracious about wanting it to go the other way.