1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... d5c4  5. f1g2  5... c7c6 Only the sixth most popular move, but even so, it still has more than a thousand games played. The Catalan is a huge opening. 6. f3e5  6... f8b4  7. c1d2  7... b4e7 [%c_effect e7;square;e7;type;GreatFind;persistent;true] 8. e2e3 Protecting the d4-pawn before capturing on c4. 8... e8g8 