context: 1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. c2c3 An interesting and popular Sicilian sideline. 3... g8f6 4.Be2 is historically the main move, but the one played and 4.Bd3 are also quite popular. 4. h2h3  4... c8d7  5. f1d3  5... b8c6  6. d3c2  6... a8c8 