Updated Chess Opening Flowchart

1. c4 e5

If 2. Nc3

2... Nc6

3. g3 then 3... g6

3. Nf3 then 3... Nf6

2... Nf6

3. Nf3 Nc6

4. e3 Bb4

If 2. Nf3

2... e4

3. Nd4 Nc6 (unlikely)

If 2. g3

2... Nc6

3. Bg2 g6

If 2. d3

2... Bb4+

3. Bd2 Bxd2

4. Qxd2 d6

3. Nb2 c5

3. Nc3 Nc6

If 2. e3

2... Nf6