1．e4 e5
2．Nf3 Nc6
3．Bc4 Bc5
4．0-0 Nf6
5．c3 0-0
＞
1．e4
1….e5
2．Nf3
2….Nc6
3．Bc4
3….Bc5
4．0-0
4….Nf6
5．c3
5….0-0
-
Bg5-Old Main Line-1 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Be7 8 ... -
1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be3 Nc6 7 Bc4 1 e4 1….c5 2 Nf3 2….d6... -
1 e4 c5 2 Nf3 d6 3 e4 cxd4 4 Nxd4 a6 5 Nc3 Nc6 6 Be2 1 e4 1….c5 2 Nf3 2….e6 3 d4 3...