Caro-Kann Defense, Tartakower Variation

The Caro-Kann begins with ...c6 and ...d5. Black exchanges the d-pawn for White's e4-pawn, White's knight recaptures on e4, and Black develops another knight to f6. The Tartakower Variation appears when White's knight captures on f6 with check and Black recaptures with the pawn from e7, written ...exf6. Black is left with pawns on f7 and f6, called doubled pawns because they occupy the same file.

The recapture opens the e-file completely: Black's e7-pawn has left it, and White's e4-pawn had already been exchanged earlier in the center. Either side may use that vertical line with a rook once the intervening pieces move, while Black's g7-pawn stays in place. This usually leaves the king area more closed than a g-pawn recapture would. The f6-pawn controls e5 and g5 and may advance to f5, although it can also become a fixed target.

In the Bronstein-Larsen Variation, ...gxf6 leaves Black a half-open g-file and creates a more dynamic position but exposes the king more. The Karpov Variation tries to prepare a knight recapture and avoid these doubled pawns. The Tartakower seeks a middle ground: an imperfect but compact structure with useful lines.