[Event "Gothenburg Interzonal"] [Site "Gothenburg"] [Date "1955.08.25"] [Round "7"] [White "Bronstein, David I"] [Black "Keres, Paul"] [Result "1-0"] [ECO "E47"] [Annotator "peter"] [SetUp "1"] [FEN "r2q1rk1/pb1p1pp1/np2pn1p/3P4/1bP5/2N5/PPB1NPPP/R1BQ1RK1 w - - 0 11"] [PlyCount "57"] [EventDate "1955.09.15"] [EventType "tourn"] [EventRounds "21"] [EventCountry "SWE"] [SourceTitle "IZT"] [Source "ChessBase"] [SourceDate "1999.07.01"] [SourceVersion "1"] [SourceVersionDate "1999.07.01"] [SourceQuality "1"] {[#]} 11. Nb5 {!!? Bronstein sacs a pawn whilst moving the knight away from the Black king - not an obvious idea at all! However, this move has a deep purpose as it tees up both d6 (trapping the bishop) and Nd6 for later in the attack.} exd5 {this defuses the d6 idea but now White has f5 at this disposal} 12. a3 Be7 13. Ng3 dxc4 (13... Re8 {leaves the position unbalanced but about level}) 14. Bxh6 $1 gxh6 (14... Nc5 {engines declare that this holds the balance but after} 15. Bxg7 {it requires extremely accurate defence from Black to survive}) 15. Qd2 Nh7 (15... Nc5 {was now essential, intending to meet 16. Qxh6 with Be4, though White retains the upper hand after} 16. Rae1 $16) (15... Re8 16. Qxh6 Bf8 17. Qg5+ Kh8 18. Nd6 $1 {a decoy move} Bxd6 19. Qh6+ Kg8 20. Nh5 Nxh5 21. Bh7+ {etc}) 16. Qxh6 {The white pieces flood in.} f5 17. Nxf5 Rxf5 (17... Rf7 18. Qg6+ Kf8 19. Nbd6 {there it goes!} Bxd6 (19... Ng5 20. Nxf7 Nxf7 21. Qg7+ Ke8 22. Qg8+ Bf8 23. Rae1+) 20. Qxd6+ Kg8 (20... Re7 21. Rae1) (20... Ke8 21. Rae1+) 21. Nh6+ Kg7 22. Qg6+) 18. Bxf5 Nf8 19. Rad1 Bg5 20. Qh5 Qf6 21. Nd6 {At last, the knight occupies its intended square!} Bc6 22. Qg4 Kh8 { White has a number of good ways of proceding. Bronstein chooses to go into hoover mode.} 23. Be4 {threatening to win a piece with Qxg5} Bh6 24. Bxc6 dxc6 25. Qxc4 Nc5 26. b4 Nce6 27. Qxc6 {White is now material up and the black king is still not safe.} Rb8 28. Ne4 Qg6 29. Rd6 Bg7 30. f4 Qg4 31. h3 Qe2 32. Ng3 Qe3+ 33. Kh2 Nd4 34. Qd5 Re8 35. Nh5 Ne2 36. Nxg7 Qg3+ 37. Kh1 Nxf4 38. Qf3 Ne2 39. Rh6+ 1-0