1. g1f3  1... d7d5  2. g2g3  2... g8f6  3. f1g2  3... c7c6  4. c2c4  4... d5c4  5. e1g1  5... e7e6  6. a2a4 White follows a plan to regain the pawn on c4. It's also possible to sacrifice it. 6... b8d7  7. d1c2  7... e6e5 An interesting and aggressive plan, trying to exploit the queen's positioning on c4. 8. c2c4  8... d7c5 This is the idea: Black prepares Be6, attacking the queen, when the knight can then go to b3. 9. f3g5 The knight creates a mating threat and takes away the bishop's e6-square, but White needs to justify his plan before Black can play h7-h6.