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|Jan-18-08|| ||handro1104: <dzechiel> Your analysis is always instructive, but sometimes it is too late to see it. Why don't you post your analysis in your web page?|
|Jan-18-08|| ||johnlspouge: Material: White has B for N. The salient feature of the position is the pinned Nd4. Nothing else suggests itself for immediate attack. Thus,|
removing the possibility of solid reinforcement for the N with e5.
The various defenses fail.
31.Ne7+ or Nf6+ throws the N for at most a P
31.d4 cxd4 threatening Rad1 to finish the N, with the threat Bxd4 followed by Bxf6+ robbing Black of the tempo required to relieve the pin by moving the Q.
Time to peek. The game continuation required more patience than I had for the analysis today, but it does make clear why this was a Friday puzzle.
I would welcome <thoughtful> insights from practical players on how much Uhlmann calculated over the board. The absence of any real possibility other than 30.Be6 made the move seem easy to choose and play.
|Jan-18-08|| ||Alphastar: After pondering for a while I decided upon 1. Be6!? with the idea of blocking the e7-pawn so that black can't play ..e5 to protect the d4-knight when it needs protection. White need not fear any knight discoveries upon the a1-rook because it will leave the black queen en prise in any case.
maybe 1. ..d5!? is the best defense but after 2. cxd5! I still don't see an adequate response for black to Rfd1 and Bxd4.
Time to check.
Well, the ingame defense seems very artifical to me. I would expect an engine to play it.
|Jan-18-08|| ||tjshann: Woke up to learn that Bobby Fischer passed away, at 64. A chess genius who enormously contributed to the popularity of chess in this country during the last century. But his accomplishments over the board were marred by controversy in his final years. His record against Uhlmann was 3+,4= and 1 loss.|
|Jan-18-08|| ||A.G. Argent: Yes, a very, very dark day for the chess world. I'm still in a mild state of shock. Condolences to any and all concerned.|
|Jan-18-08|| ||zb2cr: Oh dear. I just played 30. Rfd1 without any thought for the in-between move 30. Be6, blocking the advance of Black's Pawn.|
|Jan-18-08|| ||Amarande: Didn't see Be6.
Initially considered Rfd1, but after seeing that the reinforcement allows e5, I would have instead played Rad1. After 30 Rad1 e5 (forced) 31 f4 then forces open a file for attack, since 31 ... e4 loses the knight after 32 Qd2 (careful, careful - 32 Qc3? Nxe2+ 33 Kf2 Nxc3 34 Bxb6 Nxd1+ and White loses a Rook. Even if 33 Kg2 instead, so Nxd1 is not check, White still loses the Rook since he can't both save his Bishop and take Black's Knight).
Indeed after 30 Rad1 e5 31 f4, White gets not only the f-file, but the d-file as well, since Black will be forced to play dxe5 after the Pawn exchange. Two Bishops, open lines, more secure King, possible direct attack after that? Whereas in the actual game while White has won a piece, it seems like it's going to be a long slog to convert it to a win (there is a lack of open lines still, and Black has a worrying outside passed pawn) ...
|Jan-18-08|| ||kevin86: I had not a clue on this one. It looks like the queen is lured to e5 and trapped-escape comes only at the loss of a piece.|
|Jan-18-08|| ||LivBlockade: I never considered 30. Be6. After rejecting 30. Rxa5 because of 30...Nxe2+, all I could come up with was 30. Bd2 which seems to win an important pawn, but 30. Be6 was an instant game winner. Good puzzle.|
|Jan-18-08|| ||DarthStapler: didn't get it|
|Jan-18-08|| ||fm avari viraf: I'm indeed upset to know the sad demise of the former World Champion Bobby Fischer. May God Bless His Soul Peace in Heaven, Eternally!|
|Jan-18-08|| ||general607: I studied the position for several minutes and saw several things I liked. Ra4 followed by Rfa1 will collect black's a-pawn, but then there is the pin. I always tell my students that if a piece is pinned, try to pile on more attacks - I want that knight, not pawns. My attention went to placing a rook on d1. the only way for this to work is to prevent e5, so I settled on Be6 and Rad1 rather quickly. I guess I'd be a master or something if I had seen the Qc5 and Qe5 idea and a GM if I'd gotten as far as f4...|
|Jan-18-08|| ||wals: Noting my internal chat =
White is well into blacks neck of the woods
If the Nd4 moves to e2 + then wite loses the exchange.
No this would actually benefit white as black loses the bishop also.
Be3-d4+ Rf3 would be of no avail and the black Queen would go one
way ot another.
How about 30.Ra1xa5 Qx a5 31.Be3 x Nd4 Bf6 x d4
32Qxd4+ Rf8-f6 yes and there is also e7-e5 so wipe that
PM = well I got one move right
Be6 stops the e7 pawn moving, of course it does thanks zooter for pointing that out.
Analysis by Fritz 11: depth 19/36 time 5min 30
1. (3.24): 30...Qb6-c5 31.Rf1-d1 Nd4xe6 32.Be3xc5 Ne6xc5 33.Qd3-e3 a5-a4 34.Ra1-a2 Bf6-e5 35.f2-f4 Be5-f6 36.Kg1-g2 Nc5-e4 37.Ra2xa4 Ne4-c3 38.Rd1-a1 Nc3xa4
2. (3.43): 30...d6-d5 31.c4xd5 Qb6xb5 32.Be3xd4 Qb5xd3 33.Bd4xf6+ Kg7xf6 34.e2xd3 Rb8-b5 35.Rf1-c1 Rf8-a8 36.Rc1-c4 Rb5-b3 37.d3-d4 Rb3-b2 38.Kg1-g2 Rb2-d2 39.h2-h4
|Jan-18-08|| ||patzer2: Upon the sad news of Bobby Fischer's death, it was good to hear the kind comments and tributes of Gary Kasparov about the legacy of this former World Champion. May this unconquered King of Chess rest in peace.|
|Jan-18-08|| ||patzer2: For today's difficult Friday puzzle solution, Uhlmann's obstruction move 25. Be3!! enables him to overload on the pinned Knight. Then, just when it looks like Black's threatened Knight has escaped the pin, Black discovers he has become the victim of a removing the guard (or defender) combination with the final key followup 30. f4!|
This move, 25. Be3!!, is indeed a wonderful interplay of
three tactical themes (obstruction, pin, deflection) into a single winning combination.
|Jan-18-08|| ||johnlspouge: To answer my own implicit question
"...how much Uhlmann calculated over the board,"
now that I have had time to play the game over, the move 29.Ra1 shows that Uhlmann calculated the whole combination at least one move <before> the puzzle position on White's move 30.
In future, even if I think the key move is glaringly obvious, I will calculate it through. No wonder the CG stage is littered with the bodies of all the one-move Wunderkinder today...
|Jan-18-08|| ||littlefermat: Meh. Made no progress, I tried to draw out the black king with something very direct--overlooking the obvious fact that black's queen at b6 is in an awful position and white can use this to win a piece.|
|Jan-18-08|| ||UdayanOwen: I didn't attempt today's puzzle because of time constraints, but I had a quick look and I think it's a very neat and unsusual series of maneuvers for both sides.|
Imagine that the puzzle was in the position one move earlier with white to move. Then it would be still more subtle and unusual! You'd have to see that 29.Ra1 wins a pawn, because if 29.Qb6, then 30.Be6 and so on.
I know the puzzles here at CG tend to be winning big material or mating, but in other sources a pawn win is enough to justify a puzzle (and rightly so because you need to train yourself to use tactics to win pawns if the opportunity arises).
|Jan-18-08|| ||tylerww: I can't understand how they can call this a hard problem. I mean, there's a pin on a piece and you have pressure on that piece. The only question is how do you add more pressure and stop any further defense?|
|Jan-18-08|| ||jovack: At first I was looking for a crushing blow (like most people) and I then realized there was none. So I went to my plan B: continue to mount pressure on a critical square (this time, the knight doomed on D4). After some further analysis I realized black had no outs and white would gain some material and positional edge.
Good job by Uhlmann on forcing black into such a vice. Overall I thought this puzzle was slightly easier than yesterday's.|
|Jan-18-08|| ||origin.of.shah: My first time to join this wonderful site. It's so nice to see so many players show much interest in the game.
I'm quite surprised the legendary king passed away. At first i even didn't believe the news from my friend (to think she doesn't even know how to play chess!) that Robert's dead until I've read the forum here, and indeed it was true, and sad. |
With the game board at display, initially I did not took time to answer the puzzle, if it's a puzzle indeed.lol. But yes, Be6 is very logical. Not all players consider material advantage and think of another way for a better win, like say, positional advantage. But in this game, White is clearly better in space and material positioning. Knight on d4 is immobile and a very strong sign of weakness for Black that White should venture. Logically black wasn't able to think much of the analysis when he was threatened by Be3. I think Blocking with Bd4 for Black would have been considerable. Like wise Qb6 is a waste of tempo. No need to over analyze the moves for some have stated ideas and concepts from own self and engine wise. The game is deep whatsoever.
|Jan-18-08|| ||zooter: if it's not too late....by looking at the move 30.Be6 i can understand that the knight cannot move...|
but after 30...Nxe6 31.Bxb6 Bxa1 32.Rxa1 (or white bishop escapes and so does black's bishop), has white a winning game? He has obtained a Queen for a rook and a bishop, but is it decisive? Looking at the position I would say yes, but points wise, it seems equal.
So how should one evaluate such a position? (I know it's not relevant to the game / puzzle, but more with calculating material worth)...Thanks in advance
|Jan-19-08|| ||jovack: <zooter> Queen and Rook vs Rook and Rook (or Q R B v R R B if they avoid trading bishops) is a (relatively) clear win for white. Tactically, the white queen will dominate the board.
Black's dark squares are disgustingly weak. Even with his dark bishop, white has a bishop of same colour which does not bode well for black.
By move 30, black has a losing game.|
|Jan-19-08|| ||zooter: <jovack> wouldn't it actually be Q R B vs R R N B if they avoided trading bishops?|
|Dec-27-12|| ||Conrad93: His last name could be a pun on "patzer (Paehtzer)."|
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