1. c2c4  1... e7e6  2. b1c3  2... d7d5  3. d2d4  3... g8f6  4. c4d5  4... e6d5  5. c1g5  5... c7c6  6. e2e3  6... c8f5  7. d1f3  7... f5g6  8. g5f6  8... d8f6  9. f3f6  9... g7f6 An important endgame that has occurred in many Queen's Gambit Declined games. Black has a poor pawn structure, but it's unclear whether White can exploit the weaknesses to gain an advantage. 10. g1f3 