Chess opening · ECO A48
London System, with Be2
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1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Be2
London System, with Be2 is catalogued under ECO code A48. It is reached after 5 moves (9 half-moves): 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Be2. After the last move it is Black to play. White opens 1. d4. It is the defining line of the London System, with Be2 family, which has 3 catalogued lines in total.