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Loek van Wely vs Jeroen Piket
Hoogovens Group A (1996), Wijk aan Zee NED, rd 3, Jan-16
English Opening: King's English. Four Knights Variation Quiet Line (A28)  ·  0-1



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sac: 25...Nd4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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  Once: Aha - normal service has been resumed. The home page now has returned to the position after 25. b5. Hopefully just a glitch.

<lost in space> I can understand your frustration, but it would be a real shame for us to lose your analysis on Saturdays and Sundays. Let's cross our fingers that this was a one-off.

Fritz 11 gives the position after 26. Bxd4 as -1.2. <lost in space> has already posted this line (which Fritz also thinks is best)

25 ... Nd4 26. Bxd4 Rh6 27. Rg1 exd4 28. Qc4 Rh4 29. Rg2 Qf6 30. Qc5 b6 31. Qc6 Qe7 32. Bf1 dxe3 33. fxe3 Qxe3

click for larger view

I think I would say this is more than <=>. Black has won a pawn and the white pawns are all isolated. His knight is better than white's bishop and his rooks are more active. Fritz calls this -1.55, and I think I agree.

So I will allow that the original puzzle on move 25 just about satisfies the criteria for a Sunday. However white responds, black has a strong initiative.

But to illustate just how tough this was, Fritz took several seconds on the position after 25. b5 to find 25. ... Nd4. Normally it finds the puzzle solutions in a heartbeat.

Tomorrow is Monday, isn't it? Please tell me that Monday is next.

Aug-17-08  Slurpeeman: 25. ...Nd4 was one of my first tries, but after thinking it over for 10 minutes I decided that Rh6 must come first. Pretty much every line after 24. ...Rh6 is winning quickly. In fact, Rh6 is more logical than Nd4, since the White's King is vulnerable and Black's rook and queen have the access to the h-file. I tried Qh3, but that is not as good as Rh6 because of the bishop's interference
Aug-17-08  lost in space: Hi <Once>, I also think that monday is next!

I was very unfair with <Jason Frost>. The reason was my anger with <CG>. I gave him simply a line I found in my old scribbles from 8-9 hours ago.

Sorry for that, apologize. Will start to serously check your idea right now.

Aug-17-08  depraved: A thought has occurred to me- does anyone suppose that van Wely saw enough of the line which could have followed 26.Bxd4, rejecting the ensuing position as clearly losing, so plumped
for the less straightforward positions the way the game went? If I could foresee the position analysed by Fritz in once's comments, I'd reject it too-the diagram above has nothing to recommend it for White.
Aug-17-08  lost in space: Hi <Jason Frost>,

Sorry, I published 3 times an answer to your question and deleted them directly afterward because I found a lot of locical mistakes.

Seems, that I am too tired now and have to stop here.

33. Qd4 is a good move compared to Qc6 and Qxd5.

Tomorrow is an other days and this day is called monday!

Aug-17-08  johnlspouge: Sunday (Insane): Black to play and win.

Material: Down 2N+P for 2B. The White Kh1 is tucked away in the corner with 2 legal moves, but is has no defenders. Black has a battery Rd8 and Rd6 obscured by the Black Nd5. White threatens 26.bxc6 or 26.e4 forking Nd5 and Qf5. The Black Nc6 exposes a weak Pc7 if it moves. No check or capture seems a feasible candidate, so on to threats.

Candidates (25…): Rh6, Qh3, Ndb4, Ncb4, Nd4, Nf4 Rg6

25…Rh6 (threatening 26…Qh3 [or Qh5] 27…Qxh2#)

I saw that the move Nd4 was powerful in conjunction with heavy piece mate threats to set up Nf4, but it was glaringly obvious (particularly when the mate threats are set up first) that exd4 was a loser. I could not bust Bxd4, so the kibitzing and computer analysis will be particularly interesting to me today.

Aug-17-08  Jason Frost: <los> No Problem
I'll post mine, see what you have tomorow

25... Nd4 26. Bxd4 Rh6 27. Rg1 27...exd4 28. Qc5 dxe3 29. fxe3 29...Qe5 30. f4 Qb2 31. Rxc2 Qf6 32. Bf3 b6

33. Qd4 Qxd4(forced)
34. exd4 Rhd6

[34...Nxf4 35. Rxc7 Rhd6 36.Bc6 =]

35. f5! Ne3

[ 35. Bxd5? Rxd5 36. Rxc7 Rxb5 37. Re1 g6 38. Ree7 Rxd4 39. Rxf7 Rxd3 40. Rg7+ Kf8 41. Rgf7+ Ke8 42. Rce7+ Kd8 43. Rxh7 Rb1+ 44 Kf2 Rb2+ 45. Kf1 Rxh2 46. Rxh2 Kxe7 47. Rb2 Rd6 and despite only bieng down a pawn the rook ending appears lost for white, as the king is cut of from stopping the b pawn ]

36. Rxc7 Nxf5
37. Bc6 Nxd4
38. Ra1 h6

[38...Ne6 39. Rb7 Rxd3 40. Rxb6=]
[38...Nxc6?? 39. bxc6! Rxd3 40. Rb7! and black is actually loosing ]

39. h4! Rg6
40. Re1! Rg4
41. Re4 Rxe4
42. dxe4 Rd6
43. Kg2 g6
44. Kf2 Kf8
45. Ke3 and it looks like white should be able to hold for a draw

Not sure this is 100% correct but with best play it looks like white can hold a draw after 26. Bxd4

p.s. Only using myself and fritz 6 light for analysis so might not be perfect

Aug-17-08  PinnedPiece: <lost in space: have the impression to waste my time.>

Do you know of a better site to test your observational skills over a week's period with generally increasing levels of difficulty? I would be very surprised if you knew of a better site. The quality of the real life games selected here for analysis can't be beat, IMH

I have the impression you want to feel important in this community. Interesting comments and good analysis no matter what the puzzle is what will attract us to your comments.

No need to go at the host with a panga/paper shredder/scythe/wrecking ball/sudicide bomb (depending on your culture/upbringing).

Aug-17-08  PinnedPiece: <Once: Let's cross our fingers that this was a one-off.>

You are no doubt aware of the policy of throwing in spoilers. Whether this is a CYA policy or intentional sometimes, its still worth pointing out to people who may not have read "about our puzzles":

<Finally, we occasionally show a puzzle that we call a spoiler. These are positions where there is no move that clearly wins the game, but instead a variety of solid moves which are all playable. Usually these positions present the lure of a sacrifice which is unsound. You are expected to recognize the unsoundness of the tempting sacrifice and instead conclude that the best move is one of the "quiet" moves. We show spoilers from time to time because it encourages people to think combinations all the way through, instead of simply finding a move which looks like it initiates an attack, without considering the defenses.>

Thinking's the thing, by which we will capture the king.

Aug-17-08  johnlspouge: <<PinnedPiece> wrote: <lost in space: have the impression to waste my time.> [snip ] No need to go at the host with a panga/paper shredder/scythe/wrecking ball/sudicide bomb (depending on your culture/upbringing). >

Actually, there is a need.

<Once> and <lost in space> contribute cogent comments, which I greatly appreciate. I get on the site late, which has shielded me from its quirks today and yesterday, so I have no personal feelings to vent. I can well imagine, however, the frustration these two good gentleman might feel over being told that they devoted their considerable time and energy to misposed problems.

Would you care to offer an explanation, CG?

Aug-17-08  DarthStapler: I didn't get it
Premium Chessgames Member
  Bobsterman3000: Van Wely playing a 2570? Nowadays he only gets invited to tournaments with average elo of 2760+
Aug-17-08  Woody Wood Pusher: Best way to guard against 'wasting time' on incorrect puzzles is to do what I do and only spend a maximum of 10 minutes on the puzzle and then feed it to the computer if no solution emerges.

My chess computer has no concept of wasted time so didn't mind one bit when I pulled this position after 40 mins analysis! lol

Aug-18-08  Jason Frost: He was 2570 as well back then
Aug-18-08  InspiredByMorphy: <Slurpeeman> I too thought 25. ...Rh6 was the answer, overlooking 26.Rg1
Aug-18-08  InspiredByMorphy: 26.Bxd4 would have kept white in the game, but 25. ...Nd4 still produces a positional advantage . The position after 26.Bxd4 Rh6 27.Rg1 exd4 28.Qc5

click for larger view

Blacks pieces have more mobility and the king is safe.

Premium Chessgames Member
  kevin86: The bishop at e2 is a massive flaw in white's game and eventually prevents his escape from the mating web of rooks and knight.

A brilliant queen sac-the lines needed to be open!

Premium Chessgames Member
  Once: <pinnedpiece> Yes, I know about spoilers. No, I don't think that this puzzle was a spoiler. As far as I can tell, this was not an unsound combination that we were meant to spot. The winning move seems to be sound in all variations. Unless you have spotted something that everyone else has missed ...

The problem was that the puzzle position changed during the day, with the effect that some of us were commenting on one position and some of us were talking about another. Cue confusion and frustration.

But, hey, we're all human and that means we makes mistakes from time to time. By pointing it out in the comments, we hopefully helped CG to spot it and put it right later in the day.

That emphatically does not mean that we are being critical of, that <lost in space> doesn't think that this is a good site, or that I need to have the guidance notes repeated back to me.

It's over. Finis. Time to move on.

Aug-18-08  Jason Frost: <Once> I think the problem is more that the original puzzle, with absolute best play, probably lead to a draw and not a win.
Premium Chessgames Member
  Once: <Jason Frost> I don't know about absolute best play, but Fritz 11 reckons that the position after 25. Nd4 is worth about -1.2. And that is normally enough to win in a position where white cannot easily erect a fortress. See my post above for one line which looks promising for black.
Aug-18-08  Jason Frost: <Once> Not acording to my analysis 14 posts above. 28. Qc4? dosn't make much sense 28. Qc5 is better, after which I am still of the openion that white holds.
Premium Chessgames Member
  Once: <Jason Frost> This could go on for some time ....!

I think we may need to agree to disagree on this one. This position is way beyond my ability to calculate as both white and black have so many choices. That's when I rely on silicon assistance.

Fritz 11 deviates from your line immediately with: 26. Bxd4 Rh6 27. Rg1 exd4 28. Qc5 Rh4 29. f4 Qh3 30. Rg2 dxe3 31. fxe3 g6

click for larger view

Black is going to win either the e3 or f4 pawn. Can white hold this? I doubt it - a pawn is a pawn, after all. But the difficulty with these long lines is that most of the moves are unforced so the whole lot is difficult to analyse.

Sep-24-11  depraved: <Once> The position you gave in the diagram is interesting, and I think White is in very bad shape. He should end up a pawn down with weaknesses and a feeble bishop to boot against active Black pieces.
Mar-18-19  SpiritedReposte: Clever mating net.
Premium Chessgames Member
  fiercebadger: Rook magic ,like mayflies they rise into the air and dance for a day!
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