1. c2c4  1... e7e6  2. b1c3  2... d7d5  3. d2d4  3... h7h6 A curious move that has become popular recently. The idea is to avoid the development of the white bishop to g5. 4. g1f3  4... g8f6  5. c1f4  5... f8d6  6. f4d6  6... d8d6  7. c4c5 Duda played this move quickly, so I assume it's home preparation. It's usually difficult to decide on this pawn advance because we instinctively want to maintain greater control of the center with the pawn on c4. Additionally, White needs to keep an eye on Black's breaks with e6-e5 and b7-b6. I emphasize again the importance of the pawn play, which will be the central positional theme in this game. 7... d6e7  8. e2e3  8... e8g8  9. b2b4 An important moment. Black must choose a plan of action. 9... c7c6  10. f1e2  10... a7a6 [%c_effect a6;square;a6;type;Interesting;persistent;true] Black simply wants to put the knight on d5 and then play e5-e4 and attack the kingside. 11. e1g1  11... b8d7  12. a2a4  12... e6e5 