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Vasily Panov vs Nikolay Sorokin
URS-chT (1953), Leningrad
Sicilian Defense: Najdorf. Zagreb (Fianchetto) Variation (B91)  ·  1-0



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Kibitzer's Corner
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May-26-06  thorndeux: <ganstaman> I think 27.fxg6 might fail to 27...e5 with attack on knight and queen, although Black loses a pawn. It's one of the things we tend to forget: recaptures aren't forced most of the time.

<jajaja> Most of the time these king moves are prophylactic moves to prevent nasty checks. For example ♔h1 is often played to prepare the advance of the f-pawn, as f2-f4 opens up the g1-a7 diagonal.

May-26-06  EmperorAtahualpa: Nope, I missed this....My idea was the simple 27.fxg6.

I guess after 33...Nxf6 comes 34.f8=Q++, right? 33...Nxf6 34.f8=Q++ Kxf8 35.Qxf6+ Kg8 36.Qg7#

May-26-06  arifattar: Wouldn't 28..f6 been better?
May-26-06  itz2000: what happens if

27. Ne7+, fxe6??

May-26-06  dakgootje: < itz2000: what happens if

27. Ne7+, fxe6??>

27. Ne6 fxe6 28. Qxg6 Kf8 29. fxe6 Bxe6 30. Rf1 Bf7 31. Qxf7#

May-26-06  alphee: I got the first moves but do not understand logic of 28.... Rh6. Is it just to meet a possible 29.exf6?
Premium Chessgames Member
  Honza Cervenka: <do not understand logic of 28....Rh6> Black wanted to cover g6 in this way. But there is no satisfactory defence against white's numerous threats.
May-26-06  Nostalgia: <alphee: I got the first moves but do not understand logic of 28.... Rh6. Is it just to meet a possible 29.exf6?> 29. exf7, yes. If black doesn't take the pawn (or if he had played 28. ... f6??), it's mate in 1, unless he had placed the rook on h6 previously.


May-26-06  RandomVisitor: Here is a top level analysis showing the feasibility of 27.Re6:

23 +3.08 27.Re6 Reg8 28.Rxe7 Kf8 29.f6 Rh7 30.Bf1 Rgh8 31.Qf4 Qb8 32.Nb5 b6 33.Qxd6 Qxd6

23 +2.91 27.Ne6+ Nxe6 28.dxe6 Ref8 29.exd7 e5 30.Qd2 Qf6 31.Rf1 gxf5 32.Be4 Qh6 33.Qf2 Qf6

22 +0.78 27.Qf4 Reg8 28.Rf1 Rh7 29.a3 Kh8 30.Qf3 gxf5 31.Rxh5 e6 32.b4 axb4 33.axb4 Na4

22 +0.76 27.Qd2 e5 28.dxe6 fxe6 29.fxe6 Nxe6 30.Nxe6+ Bxe6 31.Bxb7 Bf5 32.Rc4 Rxe1 33.Qxe1 Re8

May-26-06  Ruthsarian: Why 29...Rf8 instead of Ref8?
May-26-06  wisemanleo: What if, right after Ne6+, Black played Nxe6? This way, he maintains equality and he attacks White's queen.
May-26-06  RandomVisitor: <wisemanleo>See my post above...
May-26-06  Halldor: I got the text move rather soon after some speculations on how to attack the king's pawn shield. I checked the solution to find Black's 28th move, and from there I could guess the next move by White, but I missed 30.♖xh5! - didn't see the mate if Black takes the rook, which is inexcusable of course...!
May-26-06  kevin86: I ziggied in this one:( The week starts to get long in the tooth on Friday and the undergraduate puzzles are kaput-Friday on-is more of the advanced degree stuff. Like-Masters of Chess etc.
Premium Chessgames Member
  numbersguy70: Black looks lost as early as move 10. 11... Ne5 patheticly passes on the opportunity to trade off white's most powerful piece, and 15 ... o-o is truly "castling into it".
May-26-06  YouRang: Oy - I missed. :-(

I looked at 27. Ne6+, but with 4 ways the take the knight, I couldn't hold all the variations in my head. I just missed the point.

Oh well, I'll have to be satisfied with 4/5 this week. :-|

May-26-06  itz2000: thanks <dak..>
May-26-06  jajaja: <simsan> thx a lot for your explanation :-)
May-26-06  goldenbear: I didn't even really look at this puzzle. I don't think that in an over-the-board tournament it would have taken me much more than a minute to play Ne6+. If I were to work this out in my head... it could have taken 20 minutes or so. Once, in a tournament, I played a quick knight sacrifice on move 13 or so (I played it in about 5 seconds) and only later did I learn that the sacrifice involved a rook offer followed by a queen sacrifice more than 10! moves into the combination. Unfortunately, my opponent didn't find the best defense and lost quickly to more mundane tactics. I wish my opponent had found that defense cuz I think I might have found the queen sac, seeing as how it emerged from the position by way of natural moves. But my point is that there are players out there who don't calculate at all until they are committed to a technical course and I am one of them.
May-26-06  crwynn: I don't think you need to see anything but 27.Ne6+ and that 27...fe is bad, in order to get "full credit" for solving it; I just stopped analyzing when I saw you had to take on e6 with a piece, because White has invested no material and obviously has a huge attack. It isn't like yesterday's (?) puzzle with the queen trap, where Black had a plausible defense.
May-26-06  Tariqov: <random visitor>That means those who chose Re6 are correct too right??,i might not have see everything on Re6 but i'm sure people who chose Ne6 did not see everything.So Hurray to the Re6 group!!
May-27-06  LIFE Master AJ:

click for larger view

With White to move (27.???) here ... playing the Knight to e6 is undoubtedly the strongest move. (Although more than one kibitzer has pointed out the possibility of 27.Re6.)

Fritz verifies that all of White's moves - from move 27 onward - are 100% the strongest.

An excellent problem. Thank-you chess games!!!

May-27-06  patzer2: White wins with the demolition of pawn structure combination 27. Ne6! Also winning is 27. Re6! I concur with <LIFE MASTER AJ> that 27. Ne6! is stronger (especially for the average club player) because 27. Re6! offers Black more opportunities to complicate.

Yet I was surprised to find, after four hours and 45 minutes with Fritz 8 (@ 18/54 depth @ 20319587 nodes) on a 2GHZ Athlon 64 3000+ processor with 1 gig of RAM, my computer rated both possibilities nearly equal:

1. (3.63): 27.Ne6+ Bxe6 28.dxe6 Nxe6 29.Rxe6 Rh6 30.Re2 e5 31.Qxd8 Rxd8 32.fxg6 b5 33.gxf7 Kxf7 34.c4 bxc4

2. (3.63): 27.Re6 Reg8 28.Rxe7 Kf8 29.f6 Rh7 30.a3 Rhh8 31.b4 axb4 32.axb4 Na6 33.c3 Nc7

3. (1.72): 27.Qd2 e5 28.fxe6 fxe6 29.dxe6 Nxe6 30.Bxb7 Nxd4 31.Rxd4 Rxe1 32.Qxe1 Bf5 33.c4 Qf6 34.Qd2 Qe7

4. (1.53): 27.Qf4 e5 28.fxe6 fxe6 29.Qxd6 exd5 30.Rf1 Qe7 31.Qxd5 Rhf8 32.Rxf8 Rxf8 33.Rf4

5. (1.44): 27.Qe3 e5 28.fxe6 fxe6 29.dxe6 Nxe6 30.Nxe6+ Bxe6 31.Qd4+ Qf6 32.Qxd6 Bf7 33.Qxf6+ Kxf6 34.Rf1+ Kg7 35.c4 Re2

May-28-06  LIFE Master AJ: <patzer2>
If you check the earlier comments, you will see that I was one of the first one to look at Re6 as a solution. (Just an observation.)

Good analysis as well!

May-29-23  Mathematicar: Panov had very good eye for tactics. It is not surprise that he invented one of the most agressive approach to the the Caro-Kann Defense.
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