1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. f3e5  3... d7d6  4. e5c4 An alternative to the more popular 4.Nf3. It has been played by some strong grandmasters, despite its harmless appearance and computer disapproval. 4... f6e4  5. d1e2 