[Event "Dubrovnik"] [Site "?"] [Round "0"] [White "Cortlever"] [Black "Rabar"] [Result "1/2-1/2"] [ECO "A05"] [Opening "Reti: KIA"] {Pushing past with a pawn restricts one's own opportunities} 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. O-O Be7 5. d4 O-O 6. b3 Nbd7 7. Bb2 c6 8. c4 b6 9. Qc2 Bb7 10. Nbd2 Rc8 11. Rac1 Qc7 12. Rfd1 Qb8 13. e4 Rfd8 { This example shows how the game develops when White avoids the exchange} 14. e5 {An obvious and tempting advance. On the one hand White gains some terrain; on the other hand he limits his own opportunities} 14... Ne8 15. cxd5 { Otherwise Black frees himself by ... Pc5} 15... cxd5 16. Qd3 Rxc1 {According to the principle that the side with the less available space should seek simplification} 17. Rxc1 Rc8 18. Nb1 (18. Rd1 Qc7) 18... Rxc1+ 19. Bxc1 Qc8 20. Qc3 (20. Be3 Ba6 {Black also gets plenty of elbow room. It is now very clear that White has accomplished nothing; he has had to allow the exchange of all the Rooks, and his space advantage has lost all meaning}) 20... Qxc3 21. Nxc3 Nc7 22. Nb1 {So as to play 25. Ba3 and force exchange of Black's good Bishop} 1/2-1/2