1. d2d4  1... e7e6  2. c2c4  2... f8b4  3. c1d2  3... a7a5  4. g1f3  4... g8f6  5. g2g3 Wojtaszek is one of the greatest experts of the Catalan in the world, and he is notorious for his quality opening preparation. 5... d7d5  6. f1g2  6... d5c4  7. d1c2  7... c7c5 