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Viktor Korchnoi vs Tigran Petrosian
"A Move Late and a Dollar Short" (game of the day Aug-08-2012)
Korchnoi - Petrosian Candidates Semifinal (1974), Odessa URS, rd 3, Apr-16
English Opening: Anglo-Indian Defense. Queens Indian Formation (A17)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Aug-09-12  SChesshevsky: <The Rocket: Awful play by Petrosian>

If I remember right, Petrosian wasn't in very good health for this match. In most games it showed and I think he had to quit the match early due to illness.

Aug-09-12
Premium Chessgames Member
  perfidious: Petrosian retired ill after five games, down +1 -3 =1.
Aug-09-12  SChesshevsky: <LoveThatJoker: Based on this, it is surprising that the 9th World Champion didn't go in for 7...cxd4.>

While 7...cxd4 probably would've been better there are reasons why Petrosian would have passed.

Opening up the position with complications from 8. Nxd4 Nc6 9. N4b5 with maybe 9...a6 10. Nd6+ Bxd6 11. exd6 probably wouldn't be his preferred style w/ Black against Korchnoi whose strength is putting difficult problems out in complicated positions. Rather than face a bunch of tactical possibilites Petrosian probably hoped to simplify and hold the endgame.

Also Petrosian probably wasn't prepared for that kind of line and was hoping to get to something like the 30+ mover he lost in gm 1. I'm pretty sure Petrosian felt like he had some good chances in that game and maybe hoped for another shot.

Aug-09-12
Premium Chessgames Member
  LoveThatJoker: <SChesshevsky> What you stated regarding why the 9th WC didn't go with 7...cxd4! does not fall out of the realm of possibility.

It should be noted that, according to Stockfish, 7...cxd4! is indeed better (and not merely probably better).

Of course there is no way that the 9th WC and his team would have had recourse to Super-GM level Chess engines in the '70s, but it is unfortunate that they did not give the lines starting with 7...cxd4! more serious consideration - as they, at least on one notable occasion, had already proven successful.

LTJ

PS. Stockfish confirms that 7...cxd4! 8. Nxd4 Nc6 9. Ndb5 a6 10. Nd6+ Bxd6 11. exd6 Nd4 12. Qd3 Nf5 is fully equal for Black.

Aug-09-12  The Rocket: <Petrosian retired ill after five games, down +1 -3 =1>

That makes sense. He played this game like a 2000 player.

Aug-09-12  Petrosianic: Not ill, exactly. There was a huge blowup that you would not believe if I told it to you, but you can read Jude Acer's version of it here:

http://www.chessdryad.com/articles/...

But he did recover to win the next game in good style:

Petrosian vs Korchnoi, 1974

In fact, an oddity of the 1974 Candidates is that it seems that in several cases the best game of the match was won by the loser.

In fact, come to think of it, in my opinion, in the 5 matches in which the loser won a game at all, the loser had the best win every time. IMO, this happened in:

Korchnoi-Mecking
Petrosian-Portisch
Korchnoi-Petrosian
Karpov-Spassky
Karpov-Korchnoi

Aug-09-12  Absentee: In "Chess is my life" Korchnoi recounts a peculiar version of how this match played out: Petrosian had purportedly brought a "posse" of armenian fans to the stage, when Korchnoi objected Petrosian grabbed the chance to interrupt the match complaining that he had "insulted his nation and its people", and after losing this game faked an illness and withdrew. Knowing what kind of douche Korchnoi has always been, I don't know how much stock we can put in his chronicle, but it's still interesting even though it probably tells us more about Korchnoi than about Petrosian.
Aug-23-12  SChesshevsky: <Petrosianic: Not ill, exactly.>

I'm pretty sure Petrosian's health or related had something to due to his poor form in the match. It seems in general he wasn't playing at his usual even from game 1 and it was reported that after Korchnoi's request for postponement of game 6, Petrosian was in the hospital for kidney pains and had to resign.

I think Petrosian's poor form showed even in his best game 4, Gligoric noted that Korchnoi in a poor line and serious time trouble still had drawing chances.

But even if Petrosian's bad form in the earlier games weren't health related, I think it's doubtful that he quit the match because of some sort of personal conflict with Korchnoi.

Dec-12-12
Premium Chessgames Member
  perfidious: < The Rocket: <Petrosian retired ill after five games, down +1 -3 =1> That makes sense. He played this game like a 2000 player.>

As one who proclaims himself having a '2000+ Elo', you'd sure be one to know......

Sep-29-13  s0030135: Interestingly, I had a tournament game today which had exactly the same final position as this game.
Feb-07-18  SEVEN: Honza Cervenka told us A little deja vu with Jakovenko Alekseev. Its also one more with D Karatorossian vs J Blauert, 2005
May-02-25  N.O.F. NAJDORF: What is wrong with 37...Nf5+ ?
May-02-25
Premium Chessgames Member
  beatgiant: <N.O.F. NAJDORF> Simply 37...Nf5+ 38. Bxf5 gxf5 39. h5. White will eventually maneuver the king around and break through on the kingside, winning.
May-03-25  N.O.F. NAJDORF: I tried that and it did not work.

Black can play a4 to prevent the white king from penetrating on the queen side and play waiting moves with his king, if necessary coming to g6, or play h6 to prevent the white king from penetrating on the king side.

May-03-25
Premium Chessgames Member
  beatgiant: <N.O.F. NAJDORF> White can triangulate to penetrate on the kingside. Here's an example.

37...Nf5+ 38. Bxf5 gxf5 39. h5 Kf7 40. Kf3 Kg7 41. Kg3 Kf7 42. Kh4 Kg7 43. h6+ Kg6


click for larger view

Now 44. Kg3 Kf7 <45. Kh3> Kg6 46. Kh4 Kf7 47. Kh5, followed by 48. g6 next and White breaks through.

May-03-25
Premium Chessgames Member
  perfidious: From the position after 37....Nf5+ 38.Bxf5 gxf5 39.h5, White can also run the king to the queenside, with the enemy monarch being hamstrung.
May-03-25
Premium Chessgames Member
  beatgiant: Also, <N.O.F. NAJDORF>'s idea of playing ...a4 "to prevent the white king from penetrating on the queenside" does not work.

1...a4 2. bxa4, and later on White can break through by playing a5.

May-03-25
Premium Chessgames Member
  perfidious: That is axiomatic and I saw no point in mentioning it.
Jun-16-25  N.O.F. NAJDORF: <beatgiant:
37...Nf5+ 38. Bxf5 gxf5 39. h5 Kf7 40. Kf3 Kg7 41. Kg3 Kf7 42. Kh4 Kg7 43. h6+ Kg6 44. Kg3 Kf7 <45. Kh3> Kg6 46. Kh4 Kf7 47. Kh5, followed by 48. g6 next and White breaks through.>

37...Nf5+ 38. Bxf5 gxf5 39. h5 h6 40. Kf3 Kh7 41. Kg3 Kg7 42. Kh4 Kh7 43. g6+ Kg7 44. Kg3 Kf6 45. Kf3 Kg7 46. Ke3 Kf6 47. Kd3 Kg7 48. Kc3 Kf6 49. a3 Kg7 50. b4 a4 draws

Jun-16-25  N.O.F. NAJDORF: <beatgiant: Also, <N.O.F. NAJDORF>'s idea of playing ...a4 "to prevent the white king from penetrating on the queenside" does not work. 1...a4 2. bxa4, and later on White can break through by playing a5.>

I meant black should play ... a4 in response to b4 !

Jun-16-25  N.O.F. NAJDORF: <N.O.F. NAJDORF: ...
Black can ... play h6 to prevent the white king from penetrating on the king side.>
!
Jun-16-25
Premium Chessgames Member
  gezafan: I'm mystified by the move 7...Bxf3. What was Petrosian's thinking?
Jun-16-25
Premium Chessgames Member
  stoy: Botvinnik gave white's last move an exclamation mark (!).
Jun-17-25
Premium Chessgames Member
  beatgiant: <N.O.F. NADJORF> On 37...Nf5+ 37. Bxf5 gxf5 39. h5 h6, White could play simply 40. gxh6 with a standard win via the outside passed pawn.

Or following your own line, 37...Nf5+ 38. Bxf5 gxf5 39. h5 h6 40. Kf3 Kg8 41. Kg3 Kg7 42. Kh4 Kh7 43. g6+ Kg7 44. Kg3 Kf6,


click for larger view

Here White has 45. Kf4 Ke6 46. g7 Kf7 47. Kxf5 Kxg7 48. Ke6, outflanking Black. He can win the h-pawn and then raid the queenside, or even just directly raid the queenside, since Black's counterplay is too late.

Jun-17-25
Premium Chessgames Member
  beatgiant: <N.O.F. NAJDORF> As for stopping White's king from penetrating on the queenside, White doesn't need to play b4. As <perfidious> suggested above, White can simply play 37. Nf5+ 38. Bxf5 gxf5 39. h5 h6 40. g6, and then Kd2-Kc2-Kb2-Ka3-Ka4-Kb5 etc. and the queenside falls while Black's king is hamstrung.
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