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Jiri Pelikan vs Bernardo Wexler
Mar del Plata op (1972), rd 8
Sicilian Defense: Najdorf Variation (B95)  ·  1-0



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
Sep-19-12  JG27Pyth: I rejected Rg1 because I thought the Ne5 defense caused too many problems. My solution, Ndf6, wins the exchange, right? I feel like this is at least a partial credit solution... yes?
Sep-19-12  Djoker: 28. Rg1 ... Ne5 (...Kh5,RxN are obvious mating lines) 29. Ng5 Nxg6(equalizing) (...Kh5 is mate in 6 starting with Nxf7; Bh3 Nxf7..with clear advantage ; other moves are still bad e.g. Rff8 30.Rxg7) 30. Nxf7 Rf8
31. Nd6 Ne5(defending bishop) (..Kh5 Nxb7 and knight will be on killing spree) 32. Rxg7 (Now white can't go pawn grabbing with Knight because of g5 and Nxf3). Now in this position white is up a pawn...blacks king is exposed and bishop threatened if knight moves. But ofc better than mate.
Premium Chessgames Member
  FSR: Black's king is very boxed in, so 28.Rg1 (threatening 29.Rh1+ Bh3 30.Rg4+ Kh5 31.Rxh3#) Kh5 (28...Bh3 29.Rh1) 29.R6g2 Bh3 30.Rh1 forces mate.
Premium Chessgames Member
  Oxspawn: White has a number of nearly mates, but black has some defences, notably the white squared bishop, and is threatening to take the knight on h7. However, white can test faith in the bishop by making it work too hard.

<28. Rg1 Rxh7
29. Rh1+ Bh3
30. Rg4+ Kh5
31. Rxh3++>

Can black do better on move 28? Moving the bishop to h3 without taking the knight, does not seem to help after 29. Rh1. How about
<28. Rg1 Kh5
29. R(g6)g5+ Kh6
30. Rh1++ >

If on move 29 the black king returns to h4, then after 30. Rh1, we return to the first sequence (Bh3, Rg4+ etc.) Have I solved three in a row? Post first, check afterwards.

Sep-19-12  morfishine: <28.Rg1> appears to force the win since Black gets mated after <28.Rg1 Rxh7 29.Rh1+ Bh3 30.Rg4+ Kh5 31.Rxh3 mate>

Is there a better defense for Black?

The only other try is <28...Ne5> keeping a white rook out of <g4> plus attacking the white rook on <g6>

I have not reached a conclusion on this possibility though I did reach the exact position that <thendcomes> reached

Sep-19-12  whiteshark: After <28.Rg1 Ne5> I couldn't find any decisive moves. ♖g6/♘h7 are under atack and there is no mate in sight.
Premium Chessgames Member
  Oxspawn: Well I 'got' it, if we follow the game but since I did not even consider black playing 28. Ne5, I don't think I can take any pride in that. I'll comfort muyself with the thought that my opponent probably would not see Ne5 either. The art of chess is to play someone who is only a little better than you are, and to offer them coffee at key moments.
Sep-19-12  erniecohen: This Wednesday was as hard as some recent Saturdays.
Sep-19-12  Abdel Irada: <The great escape>

In the initial puzzle position, Black's king is in some jeopardy, but White has no forced mates against sound defense, while his knight on h7 is trapped. Unless the first player can find something recherché, Black will pick off the knight and win. I will therefore regard trading into an infinitesimally better ending sufficient for a solution.

White begins:

<28. ♖g1...>

Here Black can go wrong in a variety of ways, notably:

(1) 28. ...♖xh7??; 29. ♖h1†, ♗h3; 30. ♖g4†, ♔h5; 31. ♖xh3#


(2) 28. ...♔h5??; 29. ♖6g5† and either

(2.1) 29. ...♔h6; 30. ♖h1†, ♗h3; 31. ♖xh3# or

(2.2) 29. ...♔h4; 30. ♖h1†, ♗h3; 31. ♖g4†, ♔h5; 32. ♖xh3#.


(3) 28. ...♗h3 is a different matter, and transposes into the main line:

<28. ...♘e5!>

This gives White pause, since it attacks his rook on g6 and watches the g4 square, preventing the mating pattern in lines (1) and (2).

<29. ♘g5!...>

(White has another and more forcing alternative: 29. ♖h1†, ♗h3; 30. ♖xh3†, ♔xh3; 31. ♘g5†, ♔g3!; 32. ♘xf7†, ♘xg6; 33. ♘xh8, ♘xh8. Unfortunately, this knight ending looks like a win for Black.)

<29. ...♘xg6
30. ♘xf7, ♖f8
31. ♘d6, ♔h5
32. ♘xb7 >

Or Black can play more sharply with 31. ...♘e5; 32. ♖xg7, but here I think White has more winning chances.

On the whole, this puzzle is more complex and less viscerally satisfying than precedent would lead one to expect. But then, we appear to live in an age of diminished expectations, so perhaps this is appropriate.

Sep-19-12  Abdel Irada: I see Wexler decided to stroll into a buzz saw. :-(
Sep-19-12  atlee: like everyone else i chose 28. rg1; but checking afterwards with fritz 12, best is rg4 bg4 rg4 kh5 ng5 with ne6 to follow; the r and n mating net is hell
Sep-19-12  Rocambole: Jiri Pelikan, maestro checo nacido en Praga y radicado en Argentina desde la Olimpíada de 1939, al iniciarse la guerra. Fue un protagonista activo del quehacer ajedrecístico en Argentina en las siguientes décadas.
Sep-19-12  Abdel Irada: <atlee>: I don't see a mating net.

After 28. ♖g4†, ♗xg4; 29. ♖xg4†, ♔h5; 30. ♘g5, ♖7f8; 31. ♘e6, g5; 32. ♘xf8, ♖xf8, Black is a pawn down, but I see no immediate win, particularly with 33. ...♘e5 in the wind.

And in the above line, if 32. ♖xg5†?!, ♔h6 and White has no advantage.

Still, since the main line is inconclusive, your idea may have merit.

Sep-19-12  Patriot: 28.Rg1 looks very strong.

28...Rxh7 29.Rh1+ Bh3 30.Rg4+ Kh5 31.Rxh3#

28...Kh5 29.Rg5+

The toughest defense seems to be 28...Ne5; 29.Rh1+ Bh3 and perhaps 30.Ng5? Or 29.Ng5 right away; 29...Kh5 30.Nxf7 Nxf7 31.Rxg7

Premium Chessgames Member
  paulalbert: I went with Rg1 seeing the forced mate variations but was not sure about all the other variations, rightly so.
Sep-19-12  atlee: hi abdel,rg5 wins: after kh6 rg2 ne5 ne7 nf3 nf5 rf5 ef5 with the idea, among others, of rf2, so nh4 rh2 kh5 nf4 kg4 ng2 and it's over. naturally this is all fritz and not me,but it is beautiful and thematic in a hideous sort of way.
Sep-19-12  pericles of athens: very proud of myself today! nailed it.

my workouts with "my system" and "mco" are slowly but surely making me a better player. thank god.

Rg1 threatens mate next move (the bishop can block but only temporarily).

Sep-19-12  johnlspouge: < <JG27Pyth> wrote: I rejected Rg1 because I thought the Ne5 defense caused too many problems. My solution, Ndf6, wins the exchange, right? I feel like this is at least a partial credit solution... yes? >

The original position has White 1 P up in material. Toga evaluates 28.Ndf6 at 0.90 P at 18 plies; 28.Rg1 at 2.67 P at 16 plies.

< <JG27Pyth> wrote yesterday: [snip] I pitched a hissy on another site about being called a secret enginista, crikey accusers everywhere! I'm sure POTD old timers could well vouch for the reliable, indeed spectacular, human INACCURACY of <my> posts! >

Sure, I'll vouch :)

I'm envious, <Pythy>. I <never> posted anything so good that someone accused <me> of using an engine.

It's nice to see that you drop by occasionally. Your Mar-12-08 post on Glucksberg vs Najdorf, 1929 remains the funniest thing I have ever read.

Sep-19-12  Babes: I can't even remember the last time I missed a Wednesday puzzle. Well, I don't know how much it was a "miss", since I strongly believe that my choice, 28. Ndf6, is also winning. Also, as everybody is pointing out, 28...Ne5 is a tough nut to crack against 28. Rg1. I suppose nobody will fault me if I decide my perfect streak of solving weekday puzzles is still intact.
Sep-19-12  Castleinthesky: I didn't get it, but White had Black on the ropes for the entire game. A well played game and a Friday-ish puzzle, still entertaining.
Sep-19-12  stst: Quite some variations, offer two main courses:
28.Rg1 Rxh7
29.Rh1+ Bh3
30.Rg4+ Kh5

28.Rg1 Kh5
29.Rg2 Bh3
30.Rh1 Kh4
31.Rg4+ Kh5

Sep-19-12  stst: Pelikan agrees with my (A) version.
Premium Chessgames Member
  chrisowen: Essay it rookg1 as first option setting up mating a net in rookxh7

and i sow the seeds of destruction catching him rookh1+ only option

bh3 providing rookg4+ king hind maneovre up ride h5 low and a whip I

necessity ramble in pack rookxh3.

Premium Chessgames Member
  chrisowen: All seemed quite straight forward until loaming black knight, in e5 pops up to complicate still ruddy complex feed him in allowance (29.ng5 nxg6 30.nxf7 rf8 31.nd6) as wallow ace recoup in entrance re b7 us or bet rookxg7 looks fetching one extra piece back to provide rig rookg1 aint it another ogle when slaying gnaw away it pedal i ne5 can in effect as maniac over g4 be on guard you might not haves a move at your disposals in g5 for having at one fell swoop h7 it engage in Bernados case doggerel i should plump for ne5 dont weasel out the back door to rookxh7?
Premium Chessgames Member
  pittpanther: I too thought that things were not that clear for white after 28. Rg1 Ne5. White is better and will probably end up two pawns up but with there still being play left. I expect Wednesdays to have a more decisive combination.
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