Preventing ...Bg4.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. d2d3  4... g8f6  5. b1c3 One of the many plans available for White in the Italian Opening. 5... h7h6  6. a2a3  6... d7d6  7. c3a4  7... c5b6 