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|May-17-07|| ||nimzo knight: I thought Rg8+ Kd7 Ne5+ followed by Rd1.
wht m I missing here ??
|May-17-07|| ||LIFE Master AJ: POTD / "Problem of the day"
Thursday; May 17th, 2007.
click for larger view
White: Kg1, Qf6, Nc4, Re1, Rg3; (White Pawns) a2, f2, g2, and h2.
Black: Ke8, Qa6, Be6, Rb7, Re7; (Black Pawns) Pa7, d6, f7, and h7.
White to move. (28. ???)
Very cute. White cannot afford to be too carefree, his first rank is somewhat sensitive.
One of the main lines would be 28.Ne5!, PxN/e5; 29.Rd1!, Qd6!?; 30.Qh8+, Kd7; 31.RxQ/d6+, and Black could resign with a clear conscience.
|May-17-07|| ||twin phoenix: i'm surprised to say i actually got this one. a very pretty game. timman plays the gambit with flair and pinache.|
surprised noone has criticized 6.--,Na5?? so i'll be first. what was he thinking giving back the gambit pawn just to get the the king bishop? a truly ugly move! whites pawn center should give him a clear advantage by move 7. look this game up under 'kids don't try this at home!'
|May-17-07|| ||MostlyAverageJoe: <nimzo knight: I thought Rg8+ Kd7 Ne5+ followed by Rd1. What am I missing here ??>|
Black king escapes via c6.
|May-17-07|| ||MostlyAverageJoe: <RandomVisitor: (23-ply)> Hiarcs agrees, with these notes:|
This line: <1. (2.71): 28.h4 Qxc4 29.Rc3 Qxc3 30.Qxc3 f5 31.g4 Rb5 32.Qf6 ...> appears to be further improved by 32. Rxe6 (+3.46, 18-ply from 32nd move, i.e., 5 extra plies compared to yours).
<2. (2.55): 28.Ne5 dxe5 29.Rd1 Qd6 30.Rg8+ Kd7 31.Rd8+ Kxd8 32.Rxd6+ ...> (+2.52, same depth as above)
So, sadly, silicon monsters found a boring <h4> move that seems to be better than the flashy <Ne5>.
Somehow, I doubt that black would've resigned after h4 ...
|May-17-07|| ||psmith: <twin phoenix> Actually 6...Na5 is "book" and leads to a perfectly playable game for Black.|
|May-17-07|| ||kevin86: This answer to the puzzle is somewhat quiet. The king is pretty well trapped-so a mild move can be made to prevent the escape-of course if the knight is captured,the rook move to d1 is a bit louder-and effective.|
|May-17-07|| ||simsan: I don't know, but for some reason I am pretty sure that at least some of the guys who got this "instantly" ...would have lost this game to ... 28.Ne5 dxe5 29.Rd1 Qd6 30. Rxd6 Rb1+ and mate.|
|May-17-07|| ||Peligroso Patzer: It seems to me that Black's resignation was premature. He could have struggled on with Rook and minor piece for Queen in a line such as: 28...dxe5 29.Rd1 Qd6 30.Rg8+ Kd7 31.Rd8+ Kxd8 32.Rxd6+ Rbd7 33.Rxd7+ Kxd7. Black is probably lost here, but not so obviously for resignation after 28. Ne5 to be called for, in my opinion.|
|May-17-07|| ||twin phoenix: thanks psmith you've been finding flaws in my logic all day!|
|May-17-07|| ||Marmot PFL: <I thought Rg8+ Kd7 Ne5+ followed by Rd1.
wht m I missing here ??>
I thought the same, but it only draws.
|May-17-07|| ||Marmot PFL: <It seems to me that Black's resignation was premature. > It's hopeless, as he loses either a6 or e5 as well.|
|May-17-07|| ||unferth: <Peligroso Patzer: It seems to me that Black's resignation was premature.>|
<Marmot PFL: It's hopeless, as he loses either a6 or e5 as well.>
perhaps even more to the point, he's playing Jan Timman ...
|May-17-07|| ||outplayer: I didn't get it. i really thought about 28.Ne5 but i failed to see what happens if 28.dxe5.|
|May-17-07|| ||patzer2: Today's puzzle solution is the neat clearance pseudo sacrifice 28. Ne5!!, clearing the d-file and creating decisive threats after 28...dxe5
|May-17-07|| ||nimzo knight: <mostly average> escape on c6 can be tackled by Qf3+ kb6 rb8+ ka5 Qa3#|
|May-17-07|| ||YouRang: Not too hard for a Thursday. In fact, it was one of the first lines I considered.|
It's pretty clear that black has some severe back rank vulnerability through the hole at g7, and closing off the king's access to d7 would bring ruin. The knight is right there to do the job with 28. Ne5!, and if 28...dxe5, then the rook seals it off with 29. Rd1.
Black may be able to escape mate, but not without hemorrhaging material.
|May-17-07|| ||MostlyAverageJoe: <nimzo knight: <mostly average> escape on c6 can be tackled by Qf3+ kb6 rb8+ ka5 Qa3>|
There is a black rook on b7, so rb8 won't do any good. All that happens is you end up chasing the black king around c6, c5, and b5, with Bc4 and Rc7 helping it to hide. Example:
28. Rg8+ Kd7 29. Ne5+ dxe5 30. Rd1+ Kc6 31. Qf3+ Kb5 32. Rb1+ Kc5 33. Qe3+ Kc6 34. Rc1+ Bc4 35. Qe4+ Kc5 36. Rc8+ Rbc7
click for larger view
Put the sequence up to the first Kc6 into any decent program and try to win with the white ...
|May-17-07|| ||Helios727: <simsan>: That is why the black king needs to be driven to d7 first by Qh8+. That way the rook on d1 takes the queen on d6 with check. White can follow with g3 to avoid a back row mate.|
|May-17-07|| ||Helios727: So far even the best of these variations leave white with a Q+R and black with R+R+B. Only a 1 point difference. Is it good to resign when it is that close?|
|May-17-07|| ||unferth: <Helios727: So far even the best of these variations leave white with a Q+R and black with R+R+B. Only a 1 point difference. Is it good to resign when it is that close?>|
It can be reduced to Q v. R + B via Peligroso Patzer's line above. either way, though the material difference is slight, black has a naked, vulnerable king in the center, and he's a mere IM playing a top 10 GM. it's just a matter of time.
|May-17-07|| ||aazqua: "he's a mere IM playing a top 10 GM" While true this isn't a reason. Similar logic woudl suggest that he resign at move 1. Stick with the obvious argument which is that white is up QR to RRB with balck's shattered pawns and white's connectors on the king side. An IM should beat a GM with those advantages.|
|May-17-07|| ||unferth: unferth: <aazqua: "he's a mere IM playing a top 10 GM" While true this isn't a reason. Similar logic woudl suggest that he resign at move 1. Stick with the obvious argument which is that white is up QR to RRB with balck's shattered pawns and white's connectors on the king side. An IM should beat a GM with those advantages.>
sure, an IM probably beats a GM with those advantages ... but that's not the case here. it's the reverse and then some--a super GM holding those advantages over an IM. there's nothing wrong with recognizing context; if you're playing up 300 ELO points in a badly inferior position, you can resign with a clear conscience regardless of the piece count.|
|May-18-07|| ||Richard Taylor: < goodevans: Got it pretty quick, but then it was rather easy for a Thursday.|
Perhaps someone needs to send the CG.com guys a calendar so they know what day it is. They seem to be all over the place with the puzzle difficulties this week!>
I didn't even see this move - I thought it was one of the most difficult I have seen! But I was concentrating on trying to make Rg8+ or Qh8+ win...followed by the knight sac - this is one of the most brilliant problems I have seen - very clever by Timman.
The idea is clear and should be "obvious" but the idea of cutting off the king and then causing resignation by a knight move and then a "quiet" rook move is exquisite. You must be a very strong player.
|May-18-07|| ||fm avari viraf: White managed to get back the Black in the center with some threats & the only way to continue the attack is to open up the d-file, hence 28.Ne5 looks more logical & strong. Of course, after 29.Rd1 White should definitely win but maybe not immediately. So Black wisely resigns to preserve his energy for the next encounter. < Thanks to Mr Daniel Freeman for posting my real avatar >|
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