context: 1. g1f3  1... d7d5  2. e2e3  2... g8f6  3. c2c4  3... e7e6  4. b1c3  4... c7c6  5. b2b3  5... b8d7  6. c1b2  6... f8d6  7. d2d4  7... e8g8  8. f1e2  8... b7b6  9. e1g1  9... c8b7  10. d1c2  10... f8e8 In these positions from the Semi-Slav Defense there's always a question about how to develop the heavy pieces, since several configurations are possible, especially for the rooks. The most common development is with the queen on e7 and the rooks on c8 and d8, supporting a possible c6-c5. 11. a1d1  11... d8c7 The queen takes an alternative route. 12. h2h3  12... a7a6 Preparing c6-c5 without White having Nb5. Another plan is Rad8-Qb8. 13. f1e1 This doesn't seem like the scariest of moves, but the problem for White in this line is that the e3-e4 advance isn't that promising and patience is needed. 13... c6c5 A new and natural move. 14. c4d5  14... e6d5 