[Event "Carlsbad"] [Site "?"] [Round "0"] [White "Leonhardt"] [Black "Burn"] [Result "1-0"] [ECO "C53"] [Opening "Giuoco Piano: 4.c3"] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. Nc3 Nf6 8. O-O O-O 9. Bb3 $1 {We already know that the first obligation of the owner of a classical centre is to maintain it. The text move agrees with this principle for Black was threatening to blow up the centre with the pseudo sac ... Nxe4} ( 9. -- Nxe4 10. Nxe4 d5 11. Bd3) 9... Bg4 10. Be3 h6 {The weakening of White's pawn structure, which Black could have forced here would have helped White} ( 10... Bxf3 11. gxf3 {helping White's e4 square. The square e4 would always be reliably protected and the open g-file would be useful at the right moment}) ( 10... Re8 11. Qd3 Bxf3 (11... Bh5 $1 12. Nd2 Bg6 13. d5 Ne5 14. Qe2 $14) 12. gxf3 Nh5 13. Ne2 Qf6 14. Kg2 Qg6+ 15. Kh1 Qf6 16. f4 $1 { followed by doubling on the g-file .. White is clearly on top}) 11. Qd3 Re8 12. Nd2 Qe7 13. Rae1 Rad8 14. a3 { White is in control and can quietly strengthen his position} 14... Qf8 15. f4 $1 {This is serious, the immediate threat is to win the bishop} 15... Bc8 ( 15... -- 16. f5 -- 17. h3 Bh5 18. g4 {trapping the bishop}) 16. h3 Kh8 17. g4 $1 {With the centre fully secure, White proceeds to storm the enemy Kingside. Black's lack of space leaves him unable to find counterplay} 17... Ne7 18. Kh1 d5 {A belated and ineffective counter thrust in the centre} 19. e5 Nh7 20. f5 f6 {Black closes the position, but the protected passed pawn at e6 cripples Black's game} 21. e6 c6 22. Bf4 Ng8 23. Na4 { The scene of the action switches to the Queenside} 23... Ba5 (23... -- 24. Nxb6 axb6 25. Bc7) 24. Bc2 Qe7 25. Qg3 b5 (25... -- 26. b4 Bb6 27. Nxb6 axb6 28. Bc7 ) 26. Nc5 Bb6 27. b4 Nf8 28. a4 {All very logical} 28... a5 (28... -- 29. a5 Bxc5 30. bxc5 {Bc7 can't be prevented}) 29. Ndb3 bxa4 (29... axb4 30. a5 Ba7 31. Bc7) 30. Nxa5 Bxc5 31. Nxc6 $1 Bxd4 32. Nxe7 Rxe7 33. Bc7 Be5 34. Rxe5 Rxc7 35. Rxd5 Bb7 36. Qxc7 Bxd5+ 37. Kg1 Re8 38. Bxa4 Re7 39. Qb8 Nh7 40. Rd1 Rb7 41. Qxb7 Bxb7 42. Rd8 1-0