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Yasser Seirawan vs Jesus Nogueiras
Zagreb Interzonal (1987), Zagreb YUG, rd 12, Aug-??
Modern Defense: Averbakh Variation (A42)  ·  1-0



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Kibitzer's Corner
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Jan-17-19  ChessHigherCat: Rxc8 Rxc8 b7! Why isn't this a Monday puzzle?
Jan-17-19  ChessHigherCat: Akh hakh, winning the rook isn't enough, you have to see 45. Rxc8 Rxc8 46. Nd8! Rxd8 47. c6 Rb8 48. b7 or the slightly more complicated game line.
Jan-17-19  scholes: Seeing 45 nd8 is tough
Jan-17-19  Walter Glattke: 43.b7 wins
Jan-17-19  newzild: The first two moves are obvious, but the third is not.

According to Stockfish, 43. Rxc8! (winning) is much stronger than 43. b7 (clear advantage White).

In the game line, after 44...Rh8, 45. Nd8! is indeed strongest, but not the only winning move. For example, the simple 45...Be2 also wins.

Jan-17-19  malt: Went with 43.Ne7 g3 44.R:c8

Would not have seen 45.Nd8!

Jan-17-19  TheaN: Thursday 17 January 2019


There are a few critical variations after today's <43.Rxc8 Rxc8 44.b7>. I honestly only looked at the bit ridiculously looking <44....Rb8?!<>>, which after 45.Nxb8 gives White some situations to slip up with the Black idea Ne5 g3 f3, but White will always be first. I did miss the much more logical 44....Rh8 (or Re8) to keep the Rook on the board forcing White to give a tempo to win it or to solve in another way which Seirawan does amazingly with 45.Nd8!. If we talk about puzzle solving semantics, the Nd8 line is critical.

Jan-17-19  zb2cr: 43. Rxc8, Rxc8; 44. b7 looks promising, but it seems as though Black has counterchances by advancing his own connected passed Pawns on the Kingside.
Jan-17-19  ZeroAlpha: What is white's response to 45...Rxd8? Thx.
Jan-17-19  PizzatheHut: <ZeroAlpha> After 45...Rxd8, white will play 46. c6, after which one of the connected white passed pawns will queen.
Jan-17-19  Whitemouse: 46. c6.
Jan-17-19  Walter Glattke: The queen comes to g4 and stops the g-pawn after 45.-Rxd8 46.c6 g3 47.c7 Rh8 48.c8Q Rxc8 49.bc8Q and now 49.-g2 qould beanswered with Qg4, so as 49.-Nh4.
Jan-17-19  Walter Glattke: Ah, 47.-g2 48.cxd8Q g1Q 49.b8Q Qc1+ 50.Kb4 Qb2+ 51.Kb5 White wins.
Jan-17-19  saturn2: I took 43. Nd4
My idea was to stop the black pawns first and the push through the own ones.

43..Nxd4 44. Kxd4 g3 45. Bf1 f3 46. Ke3 g2 47. Bxg2 fxg2 48. Kf2 Ba6 49. c6 or

43...Ng5 44. b7 winning the bishop

43..g3 (making space for thw bishop) Nxf3

Premium Chessgames Member
  agb2002: The first idea that comes to mind is 43.b7 Bxb7 44.Rxb7:

A) 44... g3 45.Nd4

A.1) 45... Nxd4 46.Kxd4 g2 (46... f3 47.Ke3 seems to win both advanced pawns) 47.Rb1 looks good for White. For example, 47... Rh8 48.Rg1 f3 49.Ke3 Rh1 50.Kf2 Kf6 51.c6 Ke7 52.e5 followed by Bd5.

A.2) 45... Nh4 46.Ne6+ Kg8 47.Nxf4 + - [B].

B) 44... Ng5 45.Bd5 followed by e5 looks winning.

Jan-17-19  saturn2: The game line with 45 Nd8 seems risky to me:

45...Rxd8 46. c6 g3 47. c7 g2 48. cxd8=Q g1=Q

Jan-17-19  dumbgai: The first two moves are obvious, but Nd8 is the tough one to see. Black also put up the best possible defense, seeing how white can win after allowing a black queen is hard.
Jan-17-19  unrepentant: Saturn2, glad to see your answer. I thought 43. Nd4 was clearer also.
Premium Chessgames Member
  drollere: <the simple 45...Be2 also wins>

the interesting complication in this position is the competing pawn race, and who wins a decisive tempo with their Q. 45. Be2 Nh2 46. Ne5 g3 does leave black down a piece in a treacherous endgame.

Premium Chessgames Member
  Breunor: Nd8! I wasn't close!
Premium Chessgames Member
  Everett: 43.Nd4 seems to be a draw with best play
Premium Chessgames Member
  Breunor: After 43 Nd4 by black loses:

1) +132.69 (25 ply) 44.Rxf8 Nxc6 45.Rxf7+ Kg6 46.Rxf4 Na5 47.Rxg4+ Kh6 48.Bb5 Nb7 49.c6 Nd6 50.b7 Nxb5+ 51.Kc4 Na3+ 52.Kc5 Kh5 53.b8=Q Kxg4 54.Qf4+ Kh3 55.Qg3+ Kxg3

Premium Chessgames Member
  Everett: <Beeunor> 43.Nd4 is a white move, by definition of how it’s written
Premium Chessgames Member
  agb2002: Level 2.5: 28.?
Capablanca vs E Michelsen, 1915

click for larger view

Feb-06-20  EIDorado: It helps if you know two pawns on 6th(3rd) line are stronger than a rook.
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