Chess opening · ECO A15
English Orangutan
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1. c4 Nf6 2. b4
English Orangutan is catalogued under ECO code A15. It is reached after 2 moves (3 half-moves): 1. c4 Nf6 2. b4. After the last move it is Black to play. White opens 1. c4. It is the defining line of the English Orangutan family, which has 2 catalogued lines in total.