An interesting way to play the English Opening. The absence of the traditional d2-d3 and Nb1-c3 moves brings some peculiarities to the position. In general, White's plan will be to try to make the d2-d4 advance all at once (without placing the pawn on d3).
1. c2c4  1... e7e5  2. g2g3  2... g8f6  3. f1g2  3... d7d5  4. c4d5  4... f6d5  5. g1f3  5... b8c6 