[Event "ct"] [Site "Amsterdam"] [Round "0"] [White "Petrosian"] [Black "Pilnick"] [Result "1-0"] [ECO "A56"] [Opening "Benoni: Czech, 4.Nc3 d6"] {Whether or not to exchange Rooks} 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 6. Nf3 Bg7 7. Bg5 Na6 8. Be2 Nc7 9. Nd2 Bd7 10. a4 b6 11. Nb5 Bxb5 12. cxb5 O-O 13. b4 h6 14. Bxf6 Qxf6 15. O-O Rfd8 16. Nc4 {Natural square of the Knight} 16... Bf8 17. g3 cxb4 18. Qb3 Kg7 19. Rfc1 h5 20. Ne3 Ne8 21. Qxb4 Rdc8 22. Rc6 $1 {Following the principle of play on the files: play a Rook to the fartherst available square on the open file. It is practicably impossible for Black to exchange Rooks} 22... Qd8 (22... Rxc6 23. bxc6 (23. dxc6)) 23. Rac1 Nf6 24. Bf1 {This Bishop, although very much hampered by its own pawns, espies a chance of great activity outside the pawn chain} 24... Rcb8 (24... Nd7 25. Bh3) 25. Bh3 a6 26. Re1 axb5 27. axb5 Nh7 28. Nc4 Ra2 29. Bg2 (29. Qb3 {White was under time pressure and was content for the moment to merely maintain his grip}) 29... Qf6 30. Rf1 Ng5 31. Qb3 {Black is now bound to lose a pawn} 31... Rba8 32. h4 Nh7 33. Rxb6 Ra1 34. Rc6 R8a2 35. Qe3 Qd8 36. Rxa1 { White could have won more quickly by leaving Rooks on the board and playing Pb6 } (36. b6) 36... Rxa1+ 37. Kh2 Nf6 38. f3 Qb8 39. Qb3 Nd7 40. b6 Nc5 41. Qb2 Ra4 42. Qb5 Ra2 43. Rc7 g5 44. Ne3 gxh4 45. Nf5+ Kg8 46. gxh4 Ra6 47. b7 Ra7 48. Rc8 Qxb7 49. Qe8 Nd7 50. Nxd6 1-0