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Arturo Pomar Salamanca vs Jordi Cuadras Avellana
"Connect Four" (game of the day Nov-11-2012)
Olot (1974), Olot ESP, rd 4, Mar-20
Gruenfeld Defense: Brinckmann Attack. Grünfeld Gambit Capablanca Variation (D83)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 4 ·  Later Kibitzing>
Aug-24-05
Premium Chessgames Member
  al wazir: <jahhaj, DanRoss53, notyetagm: I missed (and I think you did too) that White can reply to 47...g3 with 48.Kxf3 winning 43...f3 44. gxf3 exf3 45.Ke4 h4 47. gxh4 g3 48.Kxf3.>

Yes, that's why I posted the second line. The point is, after 43...f3 44. gxf3 exf3 white can either try to promote his e-pawn or contest black's promotion, but not both. So black uses a zwischenzug to gain a tempo: 45. Ke4 Kg5 46. Kd4 h4 47. gxh4+ Kxh4 48. e4 g3 49. fxg3+ (49. e5 g2 50. e6 g1=Q, etc.) 49...Kxg3 50. e5 f2 51. e6 f1=Q.

If white pushes his pawn immediately he blocks the retreat of his king: 45. e4 Ke7 46. Ke5 h4 47. gxh4 g3 48. fxg3 f2, etc.

But white can draw by playing 45. Kd6!: 45...h4 46. e4 h3 47. e5+ Kf5 48. e6 h2 47. e7 h1=Q 48. e1=Q Qd1+ 49. Kc5 (not 49. Kc6 Qa4+) 49...Qc2+, etc. Black would win if he could force the exchange of queens on e2, recapturing with the f-pawn, or on e4, e6, or e8 with black's king too far from the remaining pawns, so white's king shuttles back and forth between black squares on mid-numbered ranks.

Aug-24-05
Premium Chessgames Member
  al wazir: No!!! Black has another resource! Instead of the simple-minded 46...h3, he captures: 46...hxg3! 47. e5+ (fxg3 costs white a fatal tempo) 47...Kf5 48. e6 gxf2! 49. e7 f8=Q 50. e8=Q. Both sides have queens, but black now has a two-pawn advantage. This is a win, though it might take 50 more moves to realize.
Aug-24-05  DanRoss53: <al wazir> And a further improvement on your last proposed line is 47... ♔f7! 48. e6+ ♔e8 and White is doomed.
Aug-24-05  alexandrovm: maybe 42....f4 45. and if white takes with g3, black can hope to have a passed pawn heading for h1. But if white takes with e3, I might be doomed...
Aug-24-05  I Pawn You: Hah. Beautiful. I've seen the first move here, but couldn't continue. It kinda reminds me of checkers. :D
Aug-24-05  Phoenix: This is a typical breakthrough that everyone must know. It will serve you well!
Aug-24-05
Premium Chessgames Member
  al wazir: <DanRoss53:And a further improvement on your last proposed line is 47... Kf7! 48. e6+ Ke8 and White is doomed.> In the last two of my many postings on this problem the white king is at d6 after move 47, so he responds 48. Kd7. Both sides have made one extra move, so tactically the situation is unchanged.

But in the last line, black's queen is at f1 rather than h1, so he plays 50...Qb5+! and exchanges queens, leaving white's king in an unfortunate location and thereby winning!

Aug-24-05
Premium Chessgames Member
  PhilFeeley: I'm still trying to figure this one out. What happens after 43. gxf4? Or 43. exf4 for that matter? How does black break through?
Aug-24-05  BishopofBlunder: I got everything except the correct initial move and the correct continuation.

Move over, everyone! I will be joining you in <Mating Net>'s Endgame Collection.

Aug-25-05
Premium Chessgames Member
  jahhaj: <PhilFeeley> After 43.gxf4 Black just pushes the h pawn.

After 43.exf4 Black plays 43...h4, White must take 44.gxh4 (otherwise 44...h3), then 44...g3 and then whatever White plays either the e pawn or the g pawn is going to queen.

Aug-25-05  avidfan: No one has discussed what was White's best plan/move after 37...h5, the start of the ♔ and ♙ endgame. Critical positional factors such as the opposition and zugzwang need consideration.

38.Kd4 Kg7 39.Kd5 Kg6 40.f3 exf3 41.e4 fxe4 42.Kxe4 and the King is inside the "square" if 42...h4 43.gxh4 gxh4 44.f4 Kh5 45.Kf3 h3 46.f5 , draw.

Jan-11-06  JCuadras: Very interesting all yours comments !
I remember this old game, played for me in Olot ( Spain ) Bye
http://www.jcuadras-arquitecto.com
Aug-18-06  avidfan: Should be 41.exf3 h4 42.gxh4 gxh4 43.Kf4 draw.

41...g4 42.fxg4 fxg4 43.Kf4 Kf6 44.e4 Kg6 45.e5 Kf7 46.Kg5 Ke6 47.Kxh5 Kxe5 48.Kxg4 Kf6 = (46.Kf5 h4 47.Kxg4 [not 47.gxh4 g3 wins] 47...hxg3 48.Kxg3 = )

42...hxg4 43.Kf4 Kf6 44.e4 fxe4 45.Kxe4 Kg5 46.Ke5 wins the pawn by 46...Kg6 47.Kf4 Kh5 48.Kf5 Kh6 49.Kxg4 Kg6 50.Kf4 Kf6 51.g4 Kg6 draws unless White gets the opposition at g6 with pawn at g5.

Aug-18-06  AniamL: What's wrong with 35.c6?
Aug-23-12  master of defence: What´s wrong with 43.exf4?
Oct-22-12
Premium Chessgames Member
  JonathanJ: <master of defence>

43. exf4 h4
44. gxh4 g3
45. fxg3 e3

Oct-22-12
Premium Chessgames Member
  JonathanJ: btw: my pun suggestion: Connect Four
Nov-11-12  The Last Straw: <JonathanJ> Success! :-)

I remember reading an endgame manual featuring this game.

In this kind of endgame the queen almost always swipes up everything in its path. However the hardest part in these type of endgames are to get the queen. In this case it required help from white, who made mistakes.

Nov-11-12
Premium Chessgames Member
  Phony Benoni: Very useful endgame, but punwise I think another game is considerably more spectacular:

A Timofeev vs D Khismatullin, 2009

And for the ultimate "Connect Four" experience, nothing beats F J Lee vs H Shoosmith, 1904.

Nov-11-12  The Last Straw: <The Last Straw>The book is called "Understanding Chess Endgames" by John Nunn.
Nov-11-12  The Last Straw: {The position was drawn after 37...h5, as the doubled pawns compensate for black's inactive king. However, white gave up the draw with 42.♔d6? f4! 43.♔d5 h4. By then, he was lost.
Nov-11-12  Blunderdome: M Matto vs A Mossiaguine, 2008
Nov-11-12
Premium Chessgames Member
  Phony Benoni: Game Collection: Pretty Maids All in a Row
Nov-11-12
Premium Chessgames Member
  HeMateMe: <Benoni> Is this similar to a carbon atom needing four covalent bonds, to reach its octet? Why not <Carbon four> as a pun? quarternary pawn?
Nov-11-12  Abdel Irada: <Phony Benoni>: Timofeev vs Khismatullin is more imposing, but I think I prefer this game for its purity. This was a straight pawn ending, and Black won it (forcibly as far as I can tell) with a series of pawn sacs that are counterintuitive to the point of prohibition.

(It also doesn't hurt that it's a win for my favorite defense against would-be Queen's Gambit players.)

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