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Julius Perlis vs Milan Vidmar
1st Trebitsch Memorial (1907), Vienna AUH, rd 9, Jan-21
Scotch Game: Schmidt Variation (C45)  ·  0-1


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sac: 32...Nxh3 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Jun-03-08  Alphastar: <Sneaky: Is 40...f4 even what a purist would call a "tactic" ?>

Yes. It's a single tactical operation, a sword-thrust you might say, when a combination is made up of several tactical operations.

Premium Chessgames Member
  Peligroso Patzer: <dzechiel: ***
At first I considered 40...g5 (threat 41...g4), but not only does this take too long, it opens the a1-h8 diagonal for the white queen to use in harassing the black king. *** >

<zooter: This is a real tough one for Tuesday and my answer seems to be wrong... 40...g5 seemed to trap the bishop in all variations...dunno what's wrong >

I also thought that 40. g5 was an alternate solution, since there is no obvious way for White to exploit the weakened diagonal mentioned in <dzechiel>s comment, but a check with Fritz proved me wrong. After 40. g5?, White gains a tempo with 41. Nf3! (the only drawing move) and gets a perpetual, for example: 40...g5 41.Nf3 Bxf3 42.Qc3+ d4 43.Qc8+ =.

Jun-03-08  234: Monday puzzle <9. ...?> Jun-02-08 A Hansen vs S Jensen, 1945
Jun-03-08  zooter: I'm not too convinced that this is a Tuesday puzzle reason being after

40...g5? White needs to draw by perpetual even though he's a piece ahead...!

Jun-03-08  RandomVisitor: As pointed out earlier,

<40.Nc5> f4 41.Nxe4 dxe4 42.Qd7 f3 43.Qc8+ Kh7 44.Qf5+ =.

Premium Chessgames Member
  johnlspouge: Tuesday (Easy): Black to play and win.

Material: 3Ps for N. The White Kh2 has 1 legal move, to g1. The Black Qh4 pins Bh3 to Kh2, while Be4 controls light squares around Kh2. To weave a mating net, Black must control more dark squares around Kh2.

Candidates (40): f4

40f4 (threatening 41Qg3# and 41Qf2+ 42.Bg2 Qxg2#)

The White Kh2 cannot flee without abandoning Bh3, and the influence of Be4 can be blocked only by pointless sacrifice, i.e., 41.Nf3 or 41.Qg2. To control both f2 and g3 on the next turn, the only alternative, White has only suicidal Q moves, or

41.Nf5 Bxf5 (threatening 42Qxh3+)

White's game has fallen apart.

Jun-03-08  RandomVisitor: White missed the strong 24.Qxd8+

click for larger view

where all three black responses (24...Qe8, 24...Be8, 24...Re8) result in a white advantage.

Premium Chessgames Member
  johnlspouge: <<dzechiel> wrote: [snip] "Easy" to see once you have found the move, but not easy to find the move, as nothing in the position "points" you in the right direction.>

Hi, <dzechiel>. This puzzle is definitely off the beaten track, but there is a clue to the right move. Most players know to note whether the opposing K has any legal moves, but a few weeks ago, in a nice extension of the idea, <jheiner> pointed out that if you want to weave a mating net, look at the squares you do not control and start attacking them. I incorporated his idea into my "routine", and today's solution popped out - much to my surprise, I admit.

Jun-03-08  znprdx: phew - we needed a no-brainer after yesterday's unexpected exercise in futility. Why would anyone consider ...g5? f4 is very pretty yet a rather cheap way to win considering <RandomVisitor:...24.Qd8>
Jun-03-08  RandomVisitor: <23.Rxe8+> also would have been better for white:

click for larger view <18-ply>

1. (0.64): 23...Rxe8 24.Qc7 dxc4 25.Bxc4 Be6 26.Bxe6 Qxe6 27.Rc1 Qe2 28.Rc5 g6 29.Rxc6 Qxb2 30.Ra6

2. (0.73): 23...Bxe8 24.Qc7 Qg5 25.Re1 Nf4 26.Bf1 dxc4 27.Nd4 Nd5 28.Qxa7 Qd2 29.Nxf5 Qf4+ 30.Ng3

Jun-03-08  ex0duz: I considered g5 first for a second(thinking to win a piece), and then remembered yesterdays puzzle and how CG is being tricky this week, then turned my sights onto f4, realising its a mate in one threat with no reasonable defense, and much more forceful. After that, there was nothing else to think about(that's how i roll) -_-
Jun-03-08  DavidD: The checks and captures in the position lead nowhere so one has to examine threats. 40...g5 is a very logical move to consider (41...g4 is difficult to deal with), however, it is slow giving White time to try for some type of defence. Is there another move that is faster? Yes. 40...f4! The threat of ...Qg3+ is now winning. Examining both 40...g5 and 40...f4 is logical and correct.

MostlyAverageJoe's lengthy post accurately and concisely summarizes a strong player's thinking process of this position. Well worth reading.

The most interesting question concerning the position is when Dr. Milan Vidmar--an incredibly strong player who had the unfortunate circumstance of living during the time of the "giants" Capablanca and Alekhine--saw the move 40...f4. He is a piece down in the position and if no move works, he's totally lost. Playing back, it seems he had to see this resource on move 32...Nxh3!! when he invested a piece in the attack. If so, the game is a remarkable demonstration of his calculation and visualization ability. If he didn't see this resource, then credit his intuition. However, it is very likely he saw the final game position before playing 32...Nxh3!! And that is a real tribute to his chess talent.

Premium Chessgames Member
  dzechiel: <MAJ>, <jheiner> and <JLS>: I have to agree with you assessment that today's position is much more easily solved by asking the question, "Where would I like my pieces to be?" and then figuring out a way to get them there.

While I have used this technique many, many times in the past, I didn't use it on today's position (I saw 40...f4 before getting to that point), and that explains my comment about "nothing pointing" to the key move.

I really should have given more consideration to what I was writing. Thanks for pointing this out.

Premium Chessgames Member
  YouRang: The initial assessment of the position is that I (black) have 3 pawns vs. white's bishop. It would figure then that I can win by winning a piece.

Fortunately, 40...f4 was the first move I considered. I confess that my first idea was that it gives my queen a nice double-attack square at g3 (attacking the K and B). It actually took me a minute to realize that ...Qg3 was actually threatening mate, lol!

Once I saw the mate threat, I noticed that white could do surprisingly little about it. That's because 40...f4, besides guarding g3, also guards e3 -- which happens to be exactly the square where white would need to put his queen to prevent both ...Qg3+ and ...Qf2+, either of which is deadly.

So, white's only other choice is to back his king away from the bishop, leaving it for grabs. Great puzzle!

Premium Chessgames Member
  kevin86: My move was 40...♗d3 cutting the queen from the knight and if 41 ♕xd3 ♕f2+ and mate next. The text is FAR more forceful in that white's main defenses against the mate at g3 sucuumb to the queen check above.

41 ♘e2 blocks the queen from guarding f2. Or 41 ♕c3 of course removes the queen from the second row.

Premium Chessgames Member
  YouRang: <kevin86: My move was 40...♗d3 cutting the queen from the knight and if 41 ♕xd3 ♕f2+ and mate next. >

Hmmm, you have <41.Qxd3 Qf2+> alright, but I think the <mate next> is missing. 42.Kh1 is followed by...what?

Premium Chessgames Member
  YouRang: Going back to look at the game, one has to be impressed with 32...Nxh3 and the subsequent use of pins to get 3P for a knight plus exposure of the white king.

Granted, it wasn't a 'winning' move in that white lost it via the blunder: 40.Nd4. Nevertheless, it was certainly a *sound* sacrifice, creating a situation where white was under much more pressure to play accurately than black, and it paid off.

Jun-03-08  mworld: great puzzle! thx
Premium Chessgames Member
  kevin86: oops,I tried to use a piece that I sacrificed.
Jun-03-08  Magic Castle: <Randomvisitor> Hmm. I disagree. 24...Qe8 forces white queen to retreat otherwise white concedes the open file to the white rook.(Qxr RxQ) Then, if white queen moves away, 25...Rxf1 follows and black queen rules the open file, threatening Qe5+ etc. So where is white's advantage? Help explain please.
Jun-03-08  TheaN: 2/2

Looking through the moves was hard. g5 seemed obvious, but it leads to all kinds of difficult variations. I discarded it on the account of 41.Kg1, strangely enough, but 41.Nf3 seems stronger... anyways, as it's NOT the solution I don't really care.

It's actually a pleasant move to play, on such an open board. It threatens Qg3# directly, and, well, White has a hard time coping.

Har. Everything else is futile and even mate.
--a--41.Qc3 Qf2+ with mate.
--b--41.Ne2 Qf2+ with mate, how nice.
--c--41.Qxf4/e1/f2 QxQ; Qg2 BxQ, *sigh*
--d--41.Kg1 Qxh3, futile enough.
--e--41.Nf3 Bxf3 with the pending, and more severe, threat of Qg3#.


--a--42.Qxd5 Qxh3+... hm, maybe keeps the Queens but Black is ahead so much he should win easily.





And White cannot defend the d and f advanced pawns before creating a potential breakthrough on the Queenside.

Jun-03-08  Magic Castle: <MostlyAverageJoe> I had the same result. I found 40. f4 unsure of its strength but there is no other plausible continuation for black to continue the attack but to set up Qg3+. So I somewhat guessed, this could be it. Because of the open board situation, I figured that white has a lot of resources defending or attacking but as I look further. There is no defense to f4 and no attack also by white LOL. If white leaves the second rank to defend g3, Qf2 is equally devastating. Not even the Knight can help!!! Brilliant puzzle.
Premium Chessgames Member
  YouRang: <Magic Castle: <Randomvisitor> Hmm. I disagree. 24...Qe8 forces white queen to retreat otherwise white concedes the open file to the white rook.(Qxr RxQ) >

On the other hand, after 24...Qe8 25.Qxe8 Rxe8 26.cxd5 cxd5 27.Rc1, now white commands the open c-file (in exchange for black commanding the open e-file.

White's rook may be stronger since it can hit c7 (black's cannot hit e2), and black has back-rank vulnerability.

Premium Chessgames Member
  YouRang: <kevin86: oops,I tried to use a piece that I sacrificed.> That almost always leads to trouble. ;-)
Jun-03-08  MiCrooks: 24 Rxe1 was fine, perhaps slightly worse than Qxd8+ but in neither case did either side have any kind of major advantage (Black plays Qd8 and is fine in that line).

White made a couple of errors with one being Nb3, allowing the piece sac, but even then he had chances. The major blunder was Nd4 instead of Nc5 just the move before.

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