Chess opening · ECO E02
Catalan Opening: Open Defense
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1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4
Catalan Opening: Open Defense is catalogued under ECO code E02. It is reached after 4 moves (8 half-moves): 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4. After the last move it is White to play. White opens 1. d4. It is a named variation of the Catalan Opening, which has 32 catalogued lines in total.