Chess Opening Theory/1. c4/1...c5/2. Nc3/2...Nc6

= English Opening - Symmetrical Variation=

2...Nc6
This move is not good because after 3. Nf3 g6 4.e3 Bg7 5. d4, White stands better, ready to push d5. Better is 2...g6, stopping this.

Theory table
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1.c4 c5 2.Nc3 Nc6