[Event "Pistyan"] [Site "?"] [Round "0"] [White "Tarrasch"] [Black "Euwe"] [Result "0-1"] [ECO "A53"] [Opening "Old Indian: 3.Nf3 Nbd7"] {The strategic value of d4} 1. d4 Nf6 2. c4 d6 3. Nf3 Nbd7 4. Nc3 e5 5. e4 g6 6. Be3 Bg7 7. dxe5 dxe5 8. h3 c6 9. Qd2 Qe7 10. O-O-O O-O {Although White has taken firm control of the d-file, it is clear there is nothing to be gained there} 11. Qd6 Qxd6 12. Rxd6 Re8 13. Bg5 { A fruitelss attempt to tie down the Black pieces} 13... Bf8 14. Rd2 (14. Rxf6 Kg7 $1) 14... Kg7 15. Bd3 Bb4 16. Kc2 Nc5 17. a3 Bxc3 18. Bxf6+ Kxf6 19. Kxc3 Rd8 20. Bc2 (20. Rhd1 Rxd3+ 21. Rxd3 Nxe4+ 22. Kc2 Nxf2 23. Rd6+ Ke7 24. R1d2 Ne4) 20... Rxd2 21. Nxd2 Ne6 22. g3 a5 {Black is in no hurry to occupy d4, but seeks first to cut down White's freedom of movement in every possible way} 23. Nf3 c5 $1 {In order to make sure of this critical square, Black is prepared to weaken his own "focus" on d5, arguing that it would take White at least four moves to occupy it with a Knight} 24. Ba4 Ra6 25. Rd1 Nd4 {The goal is achieved } 26. Nxd4 $2 {This gives Black a protected passed pawn as well as a Bishop which is stronger than his White counterpart} (26. Ng1 g5 27. -- Ke7 28. -- Rh6 ) 26... exd4+ 27. Kd3 Bxh3 28. Bb5 (28. Rh1 Bg2 29. Rxh7 Bf1+) 28... Rd6 29. Rh1 Bg2 30. Rxh7 Re6 31. Rh5 g5 32. Rh6+ Ke5 33. f4+ { He is bound to lose a pawn} 33... gxf4 34. Rh5+ Kd6 35. gxf4 Bxe4+ 36. Kd2 Rg6 37. Rh2 Rg2+ 38. Rxg2 Bxg2 39. Ke2 Bc6 0-1