[Event "Amsterdam"] [Site "Amsterdam"] [Round "0"] [White "Alekhine"] [Black "Euwe"] [Result "0-1"] [ECO "C49"] [Opening "Four Knights: 4.Bb5 Bb4"] {Increasing pressure against Black's Kingside} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Ne2 Ne7 8. c3 Ba5 9. Ng3 c6 10. Ba4 Ng6 11. d4 Re8 12. Bb3 exd4 13. cxd4 Be6 { The defender's first priority is to parry the opponent's threats} (13... Nxe4 14. Nxe4 Rxe4 15. Ng5 (15. Bxf7+ Kh8) 15... Re7 16. Qh5 h6 17. Qxg6 hxg5 18. Bxg5 $18 {White has a crushing attack}) 14. Ng5 Bxb3 15. Qxb3 Qd7 16. f3 { The aggressor also needs to make a defensive move. The e4 square needed this extra protection} (16. -- h6 17. Nh3 Nxe4) 16... h6 17. Nh3 Re6 (17... Bb6 18. Be3) 18. Nf4 Nxf4 19. Bxf4 Bb6 20. Rad1 {Now that Whit e is able to defend his d-pawn with the Queen Rook he has in effect gained an important tempo} 20... Rae8 21. Kh1 d5 22. e5 Nh7 {An interesting position. White has a useful 4-to-3 pawn majority on the Kingside, while Black has a corresponding majority on the Queenside. White's majority is more advanced, which gives him definite chances of attack against Black's King. Black has positional compensation for this in that his Bishop is "good" (not obstructed by his own pawns) while White's Bishop is somewhat hampered in this respect} 23. Nf5 f6 { A familiar motif: striking at the opponent's advanced post} 24. g4 $1 { Black's defence was based primarily of taking the stig out of the threat 24.Nd6 } (24. Nd6 fxe5 25. Nxe8 (25. dxe5 Rf8) 25... exf4) 24... fxe5 25. Bxe5 Nf6 26. Qd3 (26. -- Bc7 27. Qxb7 (27. Bxf6 Rxf6 28. Qxb7 Rb8 29. Qxa7 Rxb2 $132) 27... Bxe5 28. Qxd7 Nxd7 29. dxe5 Rxe5) 26... Kh8 (26... Bc7 27. Nxh6+ gxh6 28. Qg6+ Qg7 {removing the guard} 29. Qxg7+ Kxg7 30. Bxc7 {winning a pawn}) 27. Rg1 (27. g5 hxg5 28. Rg1 Rxe5 29. dxe5 Bxg1 30. exf6 Bb6 31. fxg7+ Kg8) 27... Bc7 { According to plan} 28. f4 $1 {The strength of this move lies in the fact that Black is unable to occupy the newly weakened e4 square} 28... Qf7 { By removing the Queen from the d-file Black now threatens 29. ... Bxe5} (28... Ne4 29. Bxg7+ Qxg7 30. Nxg7 Nf2+ 31. Kg2 Nxd3 32. Nxe6 $18) (28... Bxe5 29. dxe5 Ne4 30. Qxe4 {pinning tactics}) 29. Rdf1 (29. -- Bxe5 30. dxe5 Ne4) (29. Nxg7 Rxe5 30. fxe5 Ne4) 29... Bxe5 30. fxe5 Ne4 {An important trump} 31. g5 ( 31. Nxh6 Nf2+ 32. Kg2 Rxh6 33. Rxf2 Rxh2+ {removing the guard}) (31. Nd6 Qg6 32. Nxe4 Qxe4+ 33. Qxe4 dxe4 34. Re1 c5 {drawish}) 31... hxg5 32. Nd6 Nf2+ ( 32... Qg6 33. Qh3+) 33. Kg2 Nxd3 34. Nxf7+ Kg8 35. Nxg5 Rg6 { Now not only has Black overcome his difficulties, he even has the initative} 36. h4 (36. Kf3 -- 37. Kg4) 36... c5 $1 37. dxc5 (37. Rf3 c4 { Black's Queenside pawn majority would be menacing}) 37... Rxe5 38. Kh3 (38. b4 Re4 $1) 38... Nxc5 39. Rc1 Rc6 40. Rge1 Ne4 41. Rxc6 bxc6 42. Rc1 (42. Nxe4 Rxe4 43. Rxe4 $1 dxe4 44. Kg4 Kh7 45. Kf4 Kg6 46. Kxe4 Kh5 47. Kf5 $11) 42... Nxg5+ 43. hxg5 Re6 44. Kg4 Kf7 45. Rc3 a5 46. Kf3 Kg6 47. Ra3 Kxg5 48. Rxa5 Kf5 49. a4 g5 50. Ra8 Re4 51. Rf8+ Ke5 52. Re8+ Kd4 53. Rb8 c5 54. b4 c4 55. a5 Re3+ 56. Kf2 Ra3 57. Rg8 c3 58. Rxg5 Ra2+ 59. Kf3 c2 60. Rg1 0-1