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Mar-08-10 | | benjinathan: To me the real question here is do you know this position is a win:?  click for larger view You should only do the combo if you know it is a win or if you are going to be worse if you don't do the combo. I wouldn't know that it is a win. My first try as white was a black:-( |
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Mar-08-10 | | benjinathan: win. ;( |
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Mar-08-10 | | msmith5: The sac and fork trick Qxe8+ Kxe8 Ng7+ followed by Nxf5 simplifies down to an endgame that white should win being a pawn up. |
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Mar-08-10 | | kevin86: Interesting,white gives up queen for horse-then regains queen with own knight. Luck,he was not in midstream. The extra pawn will win. |
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Mar-08-10
 | | scormus: <johnlspouge> thanks for the news from dzechiel. He's a great contributor and it will be great to have him back when he's OK again. We could have done with his help yesterday! |
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Mar-08-10 | | DarthStapler: Got it easily |
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Mar-08-10 | | YouRang: I got the first moves right away, which simplify to a king and pawns game where white is clearly better (which is not to say clearly winning). I spent some time satisfying myself that white could indeed win by pushing the c-pawn. I could have spared myself that trouble if I had known that black would resign on the spot. :-\ |
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Mar-08-10 | | vanytchouck: < benjinathan: To me the real question here is do you know this position is a win:? > What you have to known because it's a kind of easy to see is that white will surely gain <the opposition>. Why? because white have 2 pawns which are on the 2th rank wich means white can use a 1 or a 2-move with one of them to lose a tempo. If black pushes his pawns to avoid this, he will set a position where the black king won't be able to enter in the white camp while the white has the break through c5. The second thing is that black has no passer as a distraction while it's easy for the white to go to d4 and play c5. The least and not the last is that is easy to count 8 moves for the black to queen their "f-pawn" if the king is at g5 (and if the white pawns are at h2 and g3) and it takes 5 move for black to queen the "d-pawn" if the king is in d4. However after white takes the opposition thanks to their a pawn, black will be forced the go back at g6 and then the white king will go to e3 and will be in d4 when the black king will be in f6. I mean, i wouldn't be sure at 100 % that i'm winning (let's say 95 %) but in the position of the puzzle, i would without any doubt play Qxe8 + in 100% of the case. |
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Mar-08-10 | | Veroth: I was with Benjinathan - could not see the advantage (missed that the white king could get to the c-pawn first), so was content with Qxa6. |
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Mar-08-10 | | brainzugzwang: <benjinathan: To me the real question here is do you know this position is a win:?> Well, that was my thought when I first looked at the puzzle and the end result of the combination. At least, I didn't think it was an obvious a win as one usually finds at the end of a Monday puzzle. But, with a little visualization and calculation from there ... I'm no endgame player, but I could see the White K marches to f4 from the given position, and Black is just about stretched to the limit at that point. White's biggest threat is getting rid of/trading the Black d-pawn and queening whichever pawn remains, but the Black K also has to defend against White gobbling up the Black K-side pawns and pushing his own. Once White eats/trades the Black f-pawn -- the only real candidate to become a passed pawn -- the White K can comfortably get to d4, play c5 dxc5; Kxc5, then play Kc6, d6 and Kc7, and the Black K can't get back to the center fast enough to challenge, nor can Black get to White's h-pawn, get out of the way and push his own h-pawn fast enough. And Black can't go defend against the c- and d-pawns first, because he has to go a long way around to the Q-side to get to c5, while the White K simply eats the f-pawn, goes to e6 and shepherds the g-pawn home (or grabs the d6 pawn and Black plays Kxc4). At least, that's how I figured it. Correct me if I'm off, but it looked simple to me. |
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Mar-08-10 | | Autoreparaturwerkbau: <johnlspouge> I'm glad you passed the info about <dzechiel>. I really miss his everyday contributions and hope he gets well in shortest time. |
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Mar-08-10 | | Bobsterman3000: Any time the knight is in 1-move range of your king, your Jedi sense of danger should heighten concerning possible forks and 1-move trickery. It's one of the simplest things that you can remember, even players as weak as me... |
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Mar-08-10 | | ECaruthers: Sometimes the extra pawn doesn't win but here black will also have an isolated pawn at f5. White shouldn't trade it but should push his king up to d4, make a passer at d5, then go after f5 when the black king has had to retreat to the 2nd rank. |
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Mar-08-10 | | wals: How it may have played out -
courtesy of Rybka 3 1-cpu:
33. Qxe8+
Kxe8 34. Ng7+ Kf7 35. Nxf5 gxf5 36. Kf2 Kf6 37. a4 Kf7 38. Ke3 Ke7 39. Kd4 Kd7
40. a5 Kd8 41. c5 dxc5+ 42. Kxc5 Kc8 43. Kd6 f4 44. gxf4 h6 45. Ke6 Kc7 46. f5
Kc8 47. f6 Kc7 48. f7 h5 49. f8=Q 1-0 |
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Mar-08-10
 | | chrisowen: Perhaps there is a monster of the week theme? The Ne6 is a daemon. I cus 27..Qc8 was bad. Tell fib 28..Rxe4 was the howler. The whittier chessman would've seen a red light going, then swiped it off. The bandit & co bold in unison (knight and queen) are the perpetrators but it moots the point now enabled since he's endured the squeeze play. |
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Mar-08-10 | | Cushion: Qxe8 enters a winning endgame. |
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Mar-08-10 | | TheChessGuy: <whiteshark> You get points for quoting Bernard Lee as M. in "The Man with the Golden Gun." The best line in the film is probably, "Jealous husbands, outraged chefs! Humiliated tailors! The list is endless!" This is in response to Bond asking who would pay $1,000,000 to have him killed. |
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Mar-08-10 | | TheaN: Monday 8 March
<33.?>
Target: 0:40;000
Taken: 0:12;007
Material: White up, ♙
Candidates: Qd7†, <[Qxe8†]> -ML-
I went for both Queen sacs but of course I should have gone for the capture immediately (no fantasy Knight mate with Qd7† or such): the extra pawn on c5 will decide the game after: <33.Qxe8†! Kxe8> else lose a Knight with Queen exchange after 33....Kf6 34.Qf8† . <34.Ng7†> the whole idea of the deflection here. <34....Ke7 35.Nxf5 gxf5 36.Kf3 Kf6 37.Kf5 Kg6 38.h3 Kf6 39.g4 fxg4 40.hxg4 Kg6 41.g5 > is one way, and the most straightforward way, to force Black to choose. He cannot leave the center as after c5 White breaks through, however, leaving the King side will allow White to pick up h7 and win the game. Time to check. |
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Mar-08-10 | | TheaN: 1/1
Fair enough. I dunno if my endgame is actually the easiest but it seems to get the job done. |
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Mar-08-10 | | zb2cr: Thanks to all who responded with advice on how to play the King and Pawns endgame that results from this puzzle. |
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Mar-08-10 | | YouRang: Just a comment: The king and pawns endgame that quickly arises from this position is winning for white, and not even in a way that's dependent on precise use of tempos or gaining by the opposition. White can simply head for d4 and start pushing the c-pawn. If the black king stops this by getting to e5 first, then the white king can shuffle between e3 and d3 until black runs out of pawn moves. The black king doesn't have any "shuffle space", so by virtue of zugzwang it must eventually retreat to f6 -- at which point white has Kd4 and c5 and the rest is easy. |
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Mar-08-10 | | YouRang: I suppose I should add that if black tries to get out of zugzwang by pushing the f-pawn to f4 while the white king is on d3, then white simply takes the f-pawn (gxf4), and proceeds with the plan to push the c-pawn. |
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Mar-08-10 | | turbo231: Knight fork of coarse, i was worried about only being up one pawn on rybka, but as <patriot> stated all black's pawns are disconnected. Not a easy win against rybka but i managed to win, because of better position and the disconnected pawns, and having one more pawn didn't hurt anything. |
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Mar-08-10
 | | Sneaky: Here's the patzer way to appraise endgames.
Even the simplest, ♔♙v♔ requires some nuances. You have to understand why this wins (regardless of whos move it is)  click for larger viewwhile this draws if White has the move:
 click for larger viewOnce you get those nuances down, and you learn the "box of the pawn" rule, you start to look into more complicated positions like this  click for larger viewHere what you do is simple: count the pawns. You'll note White has an extra one. That will be enough to decide the game. Don't misconstrue that to mean that "any extra pawn will win a ♔+♙ ending" -- that's not true at all. Like most things in chess there are many exceptions, but these involve specific motifs such as doubled pawns, complete blockades, or highly advanced pawns. In a situation like the one above, we see a garden variety pawn ending. Nothing fancy here. White merely needs to move his king to d4 and then create a passer with c5. He might play Ke3 immediately, but then Black would be pushy with Ke5, so instead he might play a coy move like h4 tossing the gauntlet back to Black--zugzwang. |
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Mar-08-10 | | e4knightf3: Surprised to see such an insightful puzzle on a Mundane-Monday. I felt <vanytchouck> and <yourang> was spot on with their explanations and reminded me that this really should be basic understanding of end-game positions - most of which centers on the opposition. |
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