Viktor Korchnoi vs Bent Larsen (1967)

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Viktor Korchnoi vs Bent Larsen
Sousse Interzonal (1967), Sousse TUN, rd 10, Oct-28
Nimzo-Indian Defense: Three Knights Variation (E21) · 1-0

ANALYSIS [x]

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Mar-10-04		ughaibu: In the games among the qualifiers at Sousse Korchnoi had the best results with no losses and wins against Larsen and Portisch.

Mar-10-04		AdrianP: Whatever happened to <dk's> suggestion that Sousse 1967 be tournament of the month? Did it get forgotten in all the "excitement" (!?) of Linares? Weren't <chessgames.com> going to create a tournament page?

Mar-10-04		ughaibu: AdrianP: Drukenknight and Cyphelium have been discussing Fischer-Matulovic.

Mar-10-04		drukenknight: Adrian: I posted a couple of Suttles games from Souza earlier last week. It's such a large tournament, I think I will devote 2 months to it. I'm not quite ready yet.

Mar-10-04		AdrianP: <dk> OK, looking forward to it...!

Mar-10-04		drukenknight: in this game, it looks like 35...Rd1 was much better way to keep white under control. Maybe he was in time trouble as 39...f5 was better. and 40...h5 maybe the last chance. 43 Rg8 was smart in order to cut off the K should black attempt to sack his R and then have 3 pawns vs the R.

Mar-10-04		dragon40: <drukenknight> Good choice of tournaments to discuss!! Sousse was HUGE and unlike LINARES,,,not a lot of BS Draws!! I have a small pamphlet iof this tournament and it was very competitive and pretty exciting for that time! All of the big names and contenders participated, I believe!! LArsen could have been in time trouble, but at that point in his career he was not prone to it at all, since he moved so fast and decisively...so he may have made those mistakes based on his characteristic on overestimating the position..I think you are correct though, 35...Rd1 would save Black quite a bit of worry later on in the game..Even back then, Korchnoi's style wore you down and you used a lots of time...

Sep-15-12		marljivi: I came to the conclusion that 23.Rc6? was a mistake.(Later Larsen could draw with 31...Kd7 32.Ra7Kd6 33.Rf7h5!? 34.Rh7...(Or 34.Rf6Rh2 35.Rh6Rh4 36.f5Ke5 37.f6Rh2 38.f7Rf2 39.Rh5Kd6 40.Rh7Ke7=.) 34...Rh2 35.Rh5f5 36.Rh7Kd5 37.h5e5 38.fe5Ke5=,etc.) Instead the correct continuation was 23.Nc6!dc6 (23...Rb6(?) 24.Ne7Kf8 25.Ke2Rd6 26.Nc8 ,but not 26.Rc8??Rc8 27.Nc8Rc6 28.Na7Rc7 .) 24.Rc6Nf4 25.ef4a5 (25...Rb7(?) 26.Kd2a5 27.Kc3a4 28.Kb4a3 29.Kb5a2 30.Ra1!?Ra3 31.Rc8Kg7 32.Kc6 ;30.Rc7!? ;27...Ra6 28.Kc4Rab6 29.Rb6Rb6 30.Rd1Rb8 31.d7Rd8 32.Kc5Kf8 33.Kd6Ra8 34.Rc1 .) 26.Kd2a4 27.Rb1!!...The only way to win.(27.Kc3?a3 28.Kb4a2 29.Ra1Kf8 30.Kb5Ra3 31.d7Rd8 32.Rc8Ke7 33.b7...(33.Rd8Kd8 34.Kc6Rc3 35.Kb7Ra3=.) 33...Rb3 34.Kc6Rc3 35.Kb6Rb3=,or 32.b7Rb3 33.Ka6Ra3 34.Kb6Rb3 35.Ka7...(35.Kc7?!Ke7 ) 35...Rd7 36.Rb6Ra3 37.Kb8Ke7 38.Rb2Kd6! 39.Kc8Rc3 40.Kb8Ra3=,or 32.Rc7Ke7 33.Kc6Rc3 34.Kb7Ra3=.) 27...a3(27...Rb7(?) 28.Rc7Rab8 29.Rb7Rb7 30.Kc3a3 31.d7Rd7 32.b7 .) 28.b7a2 (28...Rb7(?) 29.Rb7a2 30.Rc1a1Q 31.Ra1Ra1 32.Rb8Kg7 33.d7 .) 29.ba8Qab1Q (29...ab1N? 30.Kc1Ra8 31.d7! .) 30.Rc8Rc8 31.Qc8Kg7 32.d7Qb4 33.Ke3Qe1 34.Kf3Qf1 35.Kg3Qd3 36.Kh4Qe4 37.g3Qg6 38.d8QQh6 39.Kg4Qg6 40.Kf3Qh5 41.Ke3 .

Sep-15-12		SChesshevsky: One of the great things about Larsen's chess is that he didn't typically play for draws. It seems if he felt he had any chance of winning he would play the line. Of course Korchnoi was aware of this and probably felt from mid-game on he was no worse than a draw and with a probability Larsen would look to take a chance to push for a win.

Oct-24-12		marljivi: I agree,but my point is that in case of 23.Nc6,Larsen would not have even a chance for a draw,according to my analyses.

Jun-10-17		Toribio3: Good job by Korchnoi! Move 43 Rg8 is the killer move, the hostile king cannot cross g-file to help the other pawns from being attacked with impunity.

Jun-11-17		cunctatorg: The management of the whole endgame, beginning from move 23. Rxc6!?! (or even earlier...) comes from a human being of course but obviously neither from a silicon-based player nor from a mere mortal ... and the last remark is obvious!! Hooray for the inspired and ingenious play of the great and brave human chess players!! Down with the more accurate but unworthy play of the naive silicon machines...

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