A critical position.
1. g1f3  1... d7d5  2. g2g3  2... g7g6  3. f1g2  3... f8g7  4. d2d4  4... g8f6  5. c2c4  5... c7c6  6. e1g1  6... e8g8  7. a2a4 Only the eighth most popular move in this well-known position. 7... a7a5 A natural reaction, fixing the queenside. The b4-square is weakened, but White has an idea: 8. c4d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] Now if Black captures with the pawn, White gets the b5-square. If she captures with the knight, then White gets the center. 8... c6d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] The most accurate. White has more chances to fight for an advantage after the capture with the knight. 9. b1c3  9... b8c6 