1. e4 e5
2. Nf3 Nc6
3. d4 exd4
4．Nxd4 Bb4＋
5. c3
1. e4
1….e5
2. Nf3
2….Nc6
3. d4
3….exd4
4．Nxd4
4….Bb4＋
5. c3
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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...