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Ulf Andersson vs Jaime Sunye Neto
Brasilia (1981), Brasilia BRA, Mar-??
English Opening: Agincourt Defense. Catalan Defense (A13)  ·  1-0



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Kibitzer's Corner
Premium Chessgames Member
  Mateo: 30... a5 may be good. The idea is that black does not allow white to play b4 fixing the a6 pawn, so black could free his knight. For instance, 31. Kf2 Kf8 32. Ke3 Ke7 . White has a small advantage : his king and knight are more active, and black queen side is slightly weakened.
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  Mateo: 32... e5. Another possibility is 32... Ke7 33. e5 .
Premium Chessgames Member
  Mateo: 35. Nd7?! Ke6 36. Nf8 Kf7 37. Nh7 Ne6! 38. Kg4 Nd4 with the threat 39... Nc2 recovering a pawn.
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  Mateo: The alternative is 35... Kf6 36. Nd7 Ke6 37. Nf8 Ke7 38. Nh7 Ne6 39. Ng5 Nd4 40. Nf3 Nc2 41. Ne5 Nb4. White has gained a pawn but black will create at least a passed pawn on the queen side.

The strongest for white may be 42. h4. For instance, 42... Na2 (42... Kf6 43. a3! Nc2 44. Nd7 Kf7 45. Nc5 Na3 46. Na6 Nc2 47. Nc5 ±) 43. Kg5! b4 44. Kg6 b3 45. Nc4 Nc3 46. e5 ±. It seems that there is not enough counterplay on the queen side for black.

Premium Chessgames Member
  Mateo: 36... Kf6 37. h5 gh (37... g5 38. a3! ; zugswang) 38. Kh5 Kg7 39. Kh4! (zugswang).

Premium Chessgames Member
  Mateo: It looks like the decisive error was 33... g6, as Andersson got an almost won game in any variation after 34. fe.

33... ef should be the only move for black. After 34. gf, it seems that white has still a small advantage.

A very instructive ending. Sunye Neto made a single mistake, which was not obvious. This shows the hidden ideas in Andersson's subtle endings, setting difficult problems to his opponents despite seemingly simple positions.

May-13-15  Howard: Just came across this game in the Informant the other day.
Premium Chessgames Member
  Mateo: The score is wrong. The last move was 57.Kc5, not 57.Kc4 which does not make sense.
Jun-25-21  tigreton: 30 ... a5 runs into 31. Nb7 a4 32. Kf2 marching towards c5 and now b5 is very weak. There's a great video from GM Denes Boros explaining this game and how Andersson thinks in the long term, exploiting the important square c5 and the weakness of the black pawns a6-b5.

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