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Jozsef Pinter vs Zoltan Ribli
Budapest Tungsram (1975), Budapest HUN, rd 8, Mar-??
Sicilian Defense: Modern Variations (B50)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
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Jun-24-10  RandomVisitor: <al wazir><<RandomVisitor: 30.Kb1! might even be winning.>

Could you elaborate? After 30. Kb1 Bxf4, what does white have? >30.Kb1 Bxf4 31.Rxd7+ the black bishop on e6 is pinned. 31...Qxd7 32.Bxd7 Bd6 33.Qxg4 Bxg4 34.Bxg4 Bxh2 35.Nd4 white seems to be winning.

Jun-24-10  hms123: <dzechiel> Thanks.

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Jun-24-10  sshhhh: Quite an interesting game even before the puzzle. I like games with four exchange sacrifices.
Jun-24-10  CarlG: The hardest part was finding the draw rather than the win. However, several things in the game surprised me, for example 15...Bd6 rather than xd5, 21.Rxf6, 26..Be6 rather than xf6. There are a few more too, but I forget, can anyone help this poor patzer?
Jun-24-10  Whitehat1963: Agree, interesting game. Didn't come close to solving the puzzle.
Jun-24-10  tarek1: <CarlG> 26...Bxf6 blunders the queen.

15...Bxd5 is probably ok - I don't see any tactical refutation, so, trying to guess Black's reasoning, I would say : Black is behind in development and his king is still in the center. Taking this pawn in the center opens the position, something Black doesn't want to do at the moment.

As for 21.Rxf6, if White doesn't want to this, he has to do Qh3 instead, (because Qh4 Nxe3 threatening Ng2+) so Qh3 now Nxe3 Rxf6 Ng2+ is very unpleasant for White his king loses castling right and will be exposed for the rest of the game.

But I'm no less a patzer than anyone too so take it FWIW...

Jun-24-10  SuperPatzer77: <tarek1> Hey, yourself! How've you been doing?

<tarek1> <...But I'm no less a patzer than anyone too so take it FWIW...>

LOL. I'm more patzer than you are, <tarek1>. LOL LOL. That's why I'm called "SuperPatzer77". :-D.

SuperPatzer77

Jun-24-10  Drudge: I thought white could win so i figured only way he could was to guard his only pawn left.

so i tried.
54. Ne4 which protects c3 / c5 and forces black to move his King on the next move.

after further thought this was flawed idea due to 54 ...f5 -- ?

but does that also give white a draw?

54. Ne4 f5 55. c5 Kb5 56. Nd6+ Kxc5
57. Nxf5

got lost here could not decide on follow up..

Kb5 -> opens file for Bishop
Kb4 -> allows check prob pointless
Kb6 -> allows check prob pointless

Bb2 -> allows king atk
Bb1 -> allows king atk

--- will have to look at it more when i get home. regardless defiantly not fast enough to be solution.

Jun-24-10
Premium Chessgames Member
  johnlspouge: Thursday (Medium)

Pinter vs Ribli, 1975 (54.?)

White to play and draw.

Material: Down N to B+P. The Black Kb4 has 2 legal moves, a5 and b3. White has some compensation, in that the Black Ba3 is temporarily tangled up, the RP Pa4 can trap Kb4 on the a-file under the right circumstances, and the White Pc4 is more advanced than its distant counterpart, Pf7. Black cannot move Ba3-c1 temporarily, because of Nc3-a2+, forking K and B. The Black B is the right color to queen Pa4.

Candidates (54.): c5

54.c5

(1) 54Kxc5 55.Nxa4+

White has an easy draw by withdrawing his N and then planting his K on c6. Black cannot win if he drops Pa4 for Pc4 without compensation.

(2) 54Ka5 55.c6 Bd6 [if K abandons Pa4, Nc3xa4 draws]

56.Nd5 (threatening 57.c7 Bxc7 58.Nxc7)

White forces the exchange of B for Pc7, then Kd3 stops Pa4, while Nc7 stops Pf7.

(3) 54Kb3 55.c6 Bd6 56.Nxa4 Kxa4 [else, drawn as above]

57.Ke4 (overburdening Bd3)

57Kb5 58.Kf5 Kxc6

Black must expend a move to capture Pc6, because Bd6 cannot cover both c7 and f6.

59.Kf6

White captures Pf7 and draws.

Jun-24-10
Premium Chessgames Member
  patzer2: <Once> Enjoyed the Dukes of Hazard analogy in explaining today's puzzle. When I first saw it, I was trying to find a win for White. However, I didn't realize forcing the draw might be such a difficult adventure, as you so entertainingly described.

Speaking of the character Daisy Mae Duke, when I was in the US Air Force and stationed at Ellsworth AFB, near Rapid City, South Dakota, I lived on base. The house which my family and I were assigned was next to a large private ranch on land adjacent to the base. I was told by a base employee that the land belonged to "Daisy Duke."

Never thought much of it afterward. However, your amusing post aroused my curiosity. So I looked up the TV series and the Daisy Mae Duke character on wiki, and sure enough the actress Catherine Bach, who played the character in the original 1979-1985 TV series has South Dakota connections. Catherine Bach grew up on a ranch in South Dakota and graduated from high school in Rapid City. So who knows? Maybe I did once live next door to "Daisy Duke."

P.S.: One interesting aspect of Catherine Bach's career is that her film debut was as one of the children in the "Sound of Music." I haven't seen the 2005 film with Jessica Simpson or the 2007 version with April Scott. Are they worth watching?

Jun-24-10  tarek1: <SuperPatzer77> just fine thanks :) have a good day !
Jun-24-10  Patriot: Before looking at a lot of candidates, I asked myself "What is white's goal?" The answer lies in the static evaluation. White is down a pawn and technically on the losing end so reaching a draw is a good outcome for white. The next question, "Is it possible for white to win?", looks to be far-fetched since there is no immediate sequence that begins to look promising. So, what can white do to draw this?

How about the direct 54.Nxa4? 54...Kxa4 55.Kd4 Ka5 56.Kd5 Kb6 and the pawn is stopped. Or if 56.Ke5 Be7 and the e7-pawn becomes one of the untouchables. Black wins.

I briefly looked at Nb1, Nb5, Nd5, and Kd4 which all seemed pretty useless. 54.Nb1 Bb2, 54.Nb5 Bb2, 54.Nd5+ Kb3(?), 54.Kd4?? Bb2 wins easily.

54.Kc2 looked pretty interesting (and dangerous). For example, 54...f5 55.Nd1 Kxc4? 56.Ne3+ should draw. But there is much more to think about here, such as what happens on 55...f4?

So I looked around to see if there was anything better and found 54.c5, seeing that 54...Kxc5 55.Nxa4+ (winning a pawn with check) and easily drawing. This looked safer than the Kc2 variation so I decided this was likely best.

I was right about c5 but for the wrong reasons. The fact that I didn't consider the critical variation after 54...Kb3, could have meant this is winning for black and the "dangerous" Kc2 line could have cleverly drawn.

This is a subtle error in analysis and is enlightening to be wary of the next time around.

Jun-24-10  CHESSTTCAMPS: Clearly white is defending a difficult situation in this ending, with black having the advantage of two widely separated passed pawns (supported by the longer-ranging minor piece), versus a contained passed pawn for white. There are certainly ways to play for a loss, e.g. 54.Kd4?? Bb2. Common sense must be applied here: in order to secure the draw, white should strive to eliminate the most advanced pawn on the board, the a-pawn, as cheaply as possible. This suggests 54.c5, to draw the BK away from defense of the pawn. No continuation for black is winning if white defends correctly:

A) 54... Kxc5 55.Nxa4+ Kd5 (Kb4/b5 56.Nc3 is no better) 56.Nc3+ Ke5 57.Ke3

Now white can create an impenetrable light-square blockade with 58.Ne2 followed by 59.Kf3. The king can't be ousted from f3 and the knight can dance between e2 and any dark square not controlled by the bishop.

Attempts to preserve the a-pawn also fail:

B) 54... Kb3 55.c6 Bd6 56.Nxa4! Kxa4 57.Ke4 Kb5 58.Kf5 Kxc6 59.Kf6 draws

C) 54... Ka5 55.c6 Bd6 56.Nxa4 is similar to B.

Time to see how this played out...

Jun-24-10  David2009: Pinter vs Ribli, 1975 Is White playing for a win or a draw?
The win is fantasy, let's concentrate on the draw.
54. c5 (simplest) Ka5 55 Kc4 f5 56 Kd5 Bb2 57 Nxa4 draws, too easy. WAIT: 55 Kc4?? is a blunder: Bf1 and White is in trouble. Black threatens a3 and Bc4.

Back to the drawing board: try instead 54 c4 Ka5 55 Nxa4! Kxa4 56 c6 Bd3 57 Ke4 Kb5 58 Kf5 threatening 59 Kf6 and 60 Kxf7 draw. If instead 57...Bc7 58 Kf5 Bd8 59 c7 comes to the same thing. Time to check:
=====
Black actually played 54...Kb3 a line I thought weaker because of 55.c6 Bd6 56.Nxa4 with an immediate draw (54...Ka5 gives White more chances to go wrong). Draw.

Jun-24-10  JG27Pyth: Found c5 but was quite taken aback by the Kb3 response... hadn't taken that into account at all ...and JohnLSpouge's Ka5 complexities escaped me as well ...score it a fail :(
Jun-24-10  Patriot: Here's something I found while playing through the 54.Kc2 line:

54...f5 55.Nd1 f4 56.Nf2 Kxc4 57.Nd3 Bd6 58.Nb2+ Kb5 59.Nd3 a3 60.Kb3 f3 61.Ka2 Kc4 62.Nf2 Kd4 and the king eventually forces the trade of the f-pawn for the knight.

In this ending, black has the "bishop of the right color", eventually forcing the white king to part with the corner and allowing the a-pawn to promote.

It seems that 54.Kc2 is lost.

Jun-24-10
Premium Chessgames Member
  chrisowen: Black is getting slowly roasted but a couple of pig headed sacrifices goes belly up and takes him off the hook. A Pinter makes a meal of it for king he had a big edge. Spare Ribli in wait licking his chops but the draw is meat and drink. Kb4 make up, bags cover mouth watering prospects? 54..c5 stymie Zoltan and cops eyeful black track prints greasing the pole. With bishop in Bd6 both do nuts a good end.
Jun-24-10
Premium Chessgames Member
  kevin86: This one is a bit above my pay scale. lol
Jun-24-10  doubledrooks: <tarek1> wrote: <C) <54...Bc1 55.c6 Bf4 56.Ne4+ Kc5 57.Nxf4 Kxc6 58.Kc4> now the draw is not so easy because White has to go after the a pawn, and the Black king can advance and chase the White knight to clear the way for his pawn.>

I didn't examine 54...Bc1 in my original analysis, but it seems to me that 55. Nxa4 is a relatively easy draw in this line. It almost transposes to other variations after 54. c5, except the bishop covers c7 by going to f4 instead of d6. But the same idea.

Jun-24-10  tarek1: <doubledrooks>
Right. Actually I saw 54...Bc1 before seeing 54...Kb3. I started to analyze 54...Bc1, saw the drawing line described in my post with Bf4 Nd5+, didn't look further.

And only then I noticed the possibility of 54...Kb3, and this forced me to find Nxa4 as the only move to draw. Once I found it I didn't notice that it was working against Bc1 too. Nxa4 is the common theme that unites all lines, the universal panacea of this particular ending :)

Jun-24-10  tacticalmonster: 1) Black has the better minor piece: The race of passed pawns on both side of the board

2) Black is a up a pawn. The f pawn is not dangerous as it is still in its' orginal position and white king is closer to it.

3) Black pieces get into each others way. BB blocks the A pawn and BK restricts BB to only two squares.

Candidate: Nxa4 and c5

a) 1 Nxa4 Kxa4 2 Ke4 Bb2 3 Kd5 f6! 4 c5 Kb5 5 c6 Be5 6 Ke6 Kb6

b) 1 c5 Kxc5 2 Nxa4+ a theortical drawn ending

c) 1 c5 Bb2 2 Nxa4 Kxa4 3 c6 Be5 4 Ke4 Bc7 (4 f6 5 Kf5 Kb5 6 c7=) 5 Kf5 Bd8 6 c7 Bxc7 7 Kf6=

Jun-24-10  YouRang: Geez, I spent a bunch of time trying to find a clever win.

Finally I gave up, despondently thinking: "Well, at least I can always play 54.c5 to be assured of a draw..." :-\

Jun-24-10
Premium Chessgames Member
  Once: <patzer2> I am deeply envious if you once lived next door to Daisy! Not seen the most recent film - I have a bit of a downer on remakes so tend to watch them under sufference only.
Jun-24-10  RandomVisitor: After the suggested improvement 30.Kb1:


click for larger view

Rybka 3:

<[+2.93] d=23 30...f5> 31.Bxe5 Qb6 32.Qa8 Qxb5 33.Nd4 Qc5 34.h3 Re4 35.Nc6+ Kf7 36.Bd4 Qd6 37.b3 Bd5 38.Rg1 Re8 39.Qxa5 Be4 40.Rg7+ Kf8 41.Qxb4 Qxb4 42.Nxb4 Ne5 43.Rc7 f4 44.a4 f3 45.Kc1 Re6

[+3.32] d=23 30...Bxf4 31.Rxd7+ Qxd7 32.Bxd7 Bd6 33.Qxg4 Bxg4 34.Bxg4 Bxh2 35.Nd4 Bc7 36.Bf3 Kd7 37.Bd5 f6 38.Bf3 Bb6 39.Nc6 Kd6 40.Kc1 Kc5 41.Kd2 Kc4 42.b3+ Kb5 43.c4+ bxc3+ 44.Kxc3 Bf2 45.a3 Kc5

Jun-24-10  turbo231: Got it. I saw that white couldn't win so what is the best way to draw. The move is c5. Played against Houdini using c5 and got a draw first try.

Three out of four this week, I missed Tuesday's puzzle. But I'm sure that I'll miss Friday, Saturday, and Sunday puzzles. These puzzles are above my pay grade.

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