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Chess Opening Theory/1. e4/1...g6/2. d4/2...Nf6
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Modern Defence: Norwegian Defence B06 Modern Defence
2...Nf6
Instead of immediately fianchettoing their f8 bishop to g7, Black develops their g8 knight to f6. Black attacks the e4 pawn but at the same time allows the knight to be kicked away with /3. e5/.