But before the tiebreakers came a wild, oscillating Game 12. Carlsen, with the black pieces, and Caruana, with the white, began with the Sveshnikov Sicilian, just as they had in Game 8 and Game 10. Carlsen was the first to deviate from the earlier contests, perhaps a stratagem to take Caruana out of his seemingly excellent preparation for the championship, and to angle for a decisive result at last. By the 12th move, the two were in uncharted territory, looking at a board that that no two people had created before at this level of chess.