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Viktor Korchnoi vs Lajos Portisch
Marx Gyoergy Chess Memorial (2004), Paks HUN, rd 5, Jun-09
Catalan Opening: Closed. Botvinnik Variation (E07)  ·  1-0



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Kibitzer's Corner
Premium Chessgames Member
  Fusilli: If Portisch resigned, I don't doubt for a second that the game is lost, but what exactly is the winning method? Would a stronger player enlighten me? I would play 49... Rf4 and would keep the rook on the F file so that the white king can't get to the center. If white plays d6, how will he remove the rook without losing the pawn? If the plan were to exchange the d pawn for the b pawn, then why was Rd7 his last move? Help! Thanks.
Premium Chessgames Member
  Zenchess: White will play Bf7 followed by the advance of his K, d pawn, and h-pawn. Black cannot move off the back rank because of Rd8+ and Rg8 mate.
Aug-12-04  acirce: <Zenchess><White will play Bf7> When?
Premium Chessgames Member
  Fusilli: <Zenchess> <White will play Bf7> Black can then play Kg7 threatening the bishop, and white either goes back to e6 or goes to e8, which doesn't seem useful. It only works if white takes his King to g4 first (then against Kg7 white has Bxg6+). But again, can't black hold by keeping the R on the f-file? When white moves his K to the third rank, then Rf1, and Kg4 is answered with Rg1+. I insist that I believe Portisch. He must be lost, but I don't see how white wins.
Premium Chessgames Member
  Gypsy: Black will end up completely hog-tied. He gets mated in many variations. Here is how it can go:

<49...Rf4> 50.Kg3 Rf1 (50...Ra4? 51.Rd8+ Kg7 52.Rg8#) 51.d6 Rf8 52.Kg4 Bb4 53.h5 Bc5 (53...gxh5 54.Kxh5 and Kh6 with Rxh7#) 54.h6 Bc5 55.Bf7 Bb4 56.Kf4 .

Aug-12-04  acirce: <Fusilli> On your 49..Rf4, I'd play 50.d6, forcing your rook back due to the mate threat. 50..Rf8 and now maybe 51.Kh3 marching forward with the king. Idea Kg4, h5. Not sure at all how effective this is. Black has some ideas. What on 51..Be3 for example, 52.Kg4 Rf4+ and then back to f8? Sometimes even ..h5 looks plausible. White can sometimes play Bf7 just to get it to another square with tempo after ..Kg7 Bd5+ or something but does that change anything? In short, no, I don't see an obvious win.
Aug-12-04  acirce: <Gypsy><50.Kg3 Rf1> And on 50..Rf8, trying not to lose a tempo?
Premium Chessgames Member
  Fusilli: <Gypsy> That's pretty convincing! Thanks for clarifying.
Premium Chessgames Member
  Fusilli: After <Gypsy>'s 52. Kg4, <acirce>'s 52...Be3 looks better than 52...Bb4, but white can play 53.Bf7 now, since with the K in g4, Kg7 is not a possibility. Than, as <Gypsy> says, white will play for h5, etc.
Premium Chessgames Member
  Fusilli: <acirce> <on 50...Rf8, trying not to lose a tempo?> Well, my idea with 50...Rf1 was to have Rg1+ if white rushes to Kg4, but d6 then forces Rf8. If 50... Rf8, I guess white can go ahead with 51. Kg4 (if 51...Be3, 52.Bf7). It seems that tempos don't help black much.
Premium Chessgames Member
  Zenchess: I was giving White's general plan, not any exact variations.

49...Rf4 50. d6 forces the R back to f8. Then, 51. Kh3 Re8 52. Bd5 could follow. After 52...Rf8 53. Kg4 Be3 54. Rc7 Rd8 55. d7, White plays Rc8 and brings the K to e6 to chase the B off of the defense of the R. Black must defend this by bringing the K to f8, but then he will be in zugzwang because none of his pieces can move.

Aug-13-04  acirce: <Fusilli> <Well, my idea with 50...Rf1 was to have Rg1+ if white rushes to Kg4, but d6 then forces Rf8. If 50... Rf8, I guess white can go ahead with 51. Kg4 (if 51...Be3, 52.Bf7). It seems that tempos don't help black much.> Right, it does work. The tempo doesn't matter there, however, what happens if he doesn't play Rf4 at all? Now THAT must be a waste of time if he's forced back by a king move that is useful for white anyway. What if 49..Be3 for example, or maybe there is a more exact bishop move? The king can't reach g4 without being disturbed. How to make progress here?
Premium Chessgames Member
  Zenchess: 49...Be3 50. d6 Bf2 51. Rb7 Bxh4 52. Rxb6 Bxg5 53. d7 and White gets another advanced passer. Waiting Bishop moves allow Rb7, d7, and Rc7, leading into the previous variation.
Aug-13-04  acirce: <Zenchess> Excuse me for being obstinate, but .. Assuming that <49...Be3 50. d6 Bf2 51. Rb7 Bxh4 52. Rxb6 Bxg5 53. d7> is best play, I still don't see how it is a win. It is not obvious to me how White is going to promote his pawn/s. For example 53..Kg7 54.Rc6 Rd8 55.Rc8 Kf8 56.b6 Ke7 57.Kf3 Bf6 58.Ke4 Bh4 59.b7 Bg3 and the pawns seem firmly blocked. At the same time Black has his own. There are also sometimes possibilities of sacking the B for the two pawns in other plausible lines (K+R+B vs K+R is theoretical draw). 51.Kh3 Be3 52.Kg4 Rf4+ seems to lead to nothing new for White either. What am I missing?
Premium Chessgames Member
  Zenchess: After 55. b6 Kf8 56. Kf3 Bf6 57. Ke4 Bh4 58. Rc3 Ke7 59. Kd5 Bg5 60. Rf3 Bf6 61. b7 h5 62. Kc6 and the B-pawn promotes. In this line, I suggest you look at ways of driving and keeping the Black Bishop off the b8-h2 diagonal with both K and R; White's mistake in your line was putting the R on c8 and not letting it take any part in the struggle.
Jan-02-11  jmboutiere: 17...Ng5 better than 17...a6
19...Ne4 with equal chaces20.Na7 Ra8 21. Be4 Be4 22.Qe4 Ra7 19...Be4 + 1.02 Rybka 3
Jan-02-11  jmboutiere: 38...h6 better than 38...Bf8

final position + 2.01 Rybka 3

Jan-02-11  jmboutiere: 49...Rf4 50.d6 Rf8 51.Kg3 Bd4 52.Bd5 Be3
53. Kg4 Bc5 54. h5 Be3 55.Re7 Bc5 56.Re6 and
if 56...Be3 than mate in 9 and if
565...Rd8 than mate in 10 : 57.d7 gh 58. Kh5 Kg7 59.Re8 Be7 6o.Re7 Kf8 61.Rh7 Rd7 62.Rd7 Ke8 63.Rb7 Kf8 64.g6 Ke8 65.g7 etc.
Jan-02-11  cunctatorg: A beautiful, fascinating and extremely hot game!

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