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  9. e5c4  9... b7b6  10. e1g1  10... c8b7  11. d1b3 [%c_effect b3;square;b3;type;Mistake;persistent;true] This makes things too easy for Black, since now it's difficult to prevent the liberating c6-c5. 11... d8c8 [%c_effect c8;square;c8;type;GreatFind;persistent;true] Protecting the bishop and preparing c6-c5. 12. e3e4 Trying to create some activity in the center, but this make things worse. 12... c6c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] 13. d4c5  13... f6e4  14. c5b6  14... e4c5  15. b3e3  15... b7g2  16. g1g2  16... a7b6 A dream position for Black in this queen's pawn structure. She has an extra pawn in the center, good development, pressure on the h1-a8 diagonal and on the queenside.