1. e2e4  1... c7c6  2. d2d4  2... d7d5  3. f2f3 [%c_effect f3;square;f3;type;Interesting;persistent;true] This move is a popular sideline in the Caro-Kann Defense. Very strong players choose it from time to time. 3... e7e6  4. b1c3  4... b8d7 The fourth most popular move. 5. c1e3  5... f8b4  6. f1d3  6... c6c5 An interesting move. Good chances of equality are offered by the more conventional 7. e4d5  7... e6d5  8. d4c5  8... b4c3  9. b2c3 It's hard to evaluate positions with so many imbalances: White is a pawn up but he has tripled pawns. White also has the bishop pair, with the dark-squared one being particularly unpleasant. 9... g8e7  10. g1e2  10... e8g8 