Preparing the break on b4.
1. d2d4  1... g8f6  2. g1f3  2... b7b6  3. g2g3  3... c8b7  4. f1g2  4... g7g6 The double fianchetto is perhaps better than its reputation. It's a strategically risky system because it doesn't directly fight for control of the center with the pawns, unlike what would happen with …e7-e6, which supports the …d7-d5 advance. 5. c2c4  5... f8g7  6. e1g1  6... e8g8  7. d4d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] The critical move. 7... b8a6  8. b1c3  8... a6c5  9. f3d4  9... e7e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] 10. d4b3 [%c_effect b3;square;b3;type;GreatFind;persistent;true] The most challenging move. 10... d7d6  11. b3c5  11... b6c5 A difficult choice.