1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... d5c4  5. f1g2  5... a7a6 This is one of the most aggressive options against the ultra-solid Catalan Opening. Black intends to protect the c4-pawn with b7-b5. 6. e1g1  6... b8c6  7. b1c3  7... a8b8  8. e2e4  8... f8e7  9. d4d5 It's clear that both players are well prepared with the latest developments of this opening line since all these moves were played very quickly. 9... e6d5 