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| Sep-02-10 | | NARC: This one was fun |
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| Sep-02-10 | | whiteshark: Game Collection: 04_Q vs RR endgames is my particular 'hobbyhorse'. |
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| Sep-02-10 | | agb2002: White has two rooks for a queen.
Black threatens 32... Qxc7 and 32... Qxb2.
The black king is not very safe because the pawns seem to work as a wall instead of a shield. Therefore, 32.Rh4+ Kg8 33.Rhc4: A) 33... Qxb2 34.Rc8+ Kh7 (34... Kf7 35.R4c7#) 35.Rh4#. B) 33... Kh7 34.Rc8 and Black has to give up his queen to avoid mate. The obvious move 32.Rdd7 looks far more complicated, for example 32... Qxb2 33.Rxg7+ Kh6 (33... Kh8 34.Rgd7 Qb8 35.Rh7+ Kg8 36.Rcg7+ Kf8 37.Rh8+ Kxg7 38.Rxb8 + - [R]) 34.h4 Kh5 35.f3 g5 36.Rh7+ Kg6 37.h5+ Kf5 38.h6 but the queen can create some problems. |
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| Sep-02-10 | | Patriot: This looked more like a Monday problem to me (Tuesday at best). It took only a few seconds to see the combo and spent a minute or so looking for a refutation for black and couldn't find anything (i.e. I didn't want to fall for a spoiler). Black will either get mated or lose the queen for a rook. Unless white was in time trouble, I don't see how such a strong player missed this. |
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| Sep-02-10 | | Patriot: <<RandomVisitor>: White might have missed an earlier win with 23.Nxf7!> This illustrates a point I made some time ago that strong players sometimes make chess more difficult than it is. I've noticed this when playing over annotated games where the player supposedly plays a brilliant move, the author backs it up with a (!) or (!!), and it turns out that a simple move is best and wins whereas the game move may equalize. |
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| Sep-02-10 | | kevin86: Funny,I found yesterday's puzzle far over my head-I answered this one in a flash 32 ♖h4+ ♔g8 33 ♖4c4 and white wins the queen or mates. |
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| Sep-02-10 | | BOSTER: At first sight I could not understand why this is a puzzle, trying to win a queen, certainly not for free.
But ,if <CG> consider this is a puzzle, it means something is here.
The black's pawn structure ,creating the irresistable barrier,is the essense to solve this puzzle.
It looks very attractive to have two rooks on the seven rank, but here it is not the solution.
Idea is to double white rooks with tempo .
32.Rh4+ Kg8
33.Rhc4 if Kh7 34.Rc8 and threat Rh4+, if queen moved 34.Rc8+Kh7 or Kf7 and R4c7+ or Rh4+ and white wins. |
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| Sep-02-10 | | WhenHarryMetSally: yep - force the exchange of the queen on pain of mate and the game is won with a superior material advantage. surprisingly easy for a Thursday, which I don't usually come even close to getting. |
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Sep-02-10
 | | LIFE Master AJ: "Problem of The Day" (Chess Puzzle) for Thursday, September 2nd, 2010. Z Franco-Ocampos vs J Sequera, 2002. White to play, 32. '?' ***** ***** ***** ***** ***** ***** ***** ***** Unlike yesterdays' (Wednesday's) puzzle (K Landa vs M Leon Hoyos, 2008); or even Tuesday's puzzle, (M Narciso-Dublan vs Y Kryvoruchko, 2008); this one failed to present any kind of challenge at all. 32.Rh4+, Kg8; (Its not hard to calculate, its like the only legal move here!) 33.Rhc4!, "  " and White wins easily. (The threat is to fork King And Queen with the Rooks. Black will either lose his Queen ... or get mated.) Its very simple. (I even chekced it with Fritz ... others have covered the possible variations, so I will not bother.) Patriot (and maybe others) pointed out that White missed a very easy win on move twenty-three. (NxP/f7) <So the <<real question> <HAS>> to be, <Why did White play so poorly?>> I think the answer to this is quite difficult, and presents a number of possibilities. A.) White just had an off day, maybe it was jet lag or a cold/flu or something. B.) White used too much time early in the game, and had to play a lot of moves really quickly. (Quick play always lead to superficiality.) C.) PSYCHOLOGY. Most people failt to grasp this one at all, but its true. I have found that if you tell the average <"Class C"> that the position in front of them is "White to move - and mate in two," (and give them plenty of time); they will usually find it. Yet they will routinely miss opportunities like this in their own game. WHY??? Its all about expectations. When you KNOW that something is there, you will look hard ... and probably find it. The real trick is to be tactically aware ... ALL OF THE TIME!!!!!! |
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| Sep-02-10 | | vijaymathslpjz: im getting them these days....
thanks to chessgames.com |
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| Sep-02-10 | | YouRang: My plan was to play 32.Rdd7 Qxb2 33.Rxg7+, and then pray that black plays 33...Kh8?. Then, 34.Rgd7 (threating Rd8#) Qb8 35.Rh7+ Kg8 36.Rcg7+ Kf8 37.Rh8+ I wasn't quite so sure what to do after 33...Kh6, but I was pretending that my pawns would combine with my rooks to make another mate threat. I guess I don't get full credit today. |
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| Sep-02-10 | | Whitehat1963: I actually got this one. Wish I could say the same for yesterday. |
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| Sep-02-10 | | BOSTER: <Once> <In theory, time is an easy thing to understand>. In theory, time is the most difficult conception to understand.
<Patriot> <It took only a few seconds to see the combo>. There is no any combo. |
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| Sep-02-10 | | kellmano: <BOSTER: <Once> <In theory, time is an easy thing to understand>. In theory, time is the most difficult conception to understand> I refer you to Kant's Critque of Pure Reason |
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| Sep-02-10 | | Once: <BOSTER: There is no any combo.> Er, let's see: a zwischenzug, a threatened rook fork, a corridor mate and a double rook mate. Oh, and a threatened pin if black retreats his queen to f8. I'd call that a combination of tactical themes. To be sure, white doesn't sacrifice material, which some authors say is the hallmark of a combination, but other than that I think this qualifies as a combination. And the theme of my kibitz was that time only <seems> to be easy to understand, but is really quite complicated. Anything else? |
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Sep-02-10
| | LIFE Master AJ: <You Rang> If you thought about White having an outside Passed Pawn after 32.Rdd7, Qf8; and a double capture on g7 ... I was not 100% sure of my analysis, so I ran it by Fritz 12 ... 32.Rdd7 Qxb2! (Worse is: 32...Qf8? 33.Rxg7+ Qxg7 34.Rxg7+ Kxg7 35.Kf1 ) 33.Rxg7+ Kh6 34.h4 Kh5 35.f3 g5; (Unclear, "~") |
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Sep-02-10
| | LIFE Master AJ: <Earlier kibitzing <<Boster> "There is no combo.">>
I disagree. I define a combination as: "any sequence of moves linked together by a common goal and displaying tactical themes." Botvinnik would have added that a combination musty include a sacrifice ... Here the dilemma is whether to double vertically or horizontally with the Rooks, I am just astounded that a 2500+ player would not try either idea ... ... ... |
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Sep-02-10
| | LIFE Master AJ: <Once> 32.Rdd7 would have involved a monster of a pin ... there would also be a fork, over-loading the g7-square, deflection and a possible outside passed Pawn in a K+P endgame. (And maybe others that I failed to mention.) |
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Sep-02-10
| | LIFE Master AJ: <You Rang>
I think this might be one reason why the excellent staff of CG chose this particular problem (/game) ... Most of the time, with two Rooks, the normal sequence is to double the pigs on the seventh rank. Here, its a slightly different trick ... |
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| Sep-02-10 | | caissafan1963: I thought this one was a little too easy, but it was only given a difficulty of 2.5. |
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| Sep-02-10 | | wals: Black could have capitalised on Whites 23.Qf3 blunder with:- Analysis by Rybka 4 x64: depth 20:
1.  (1.02): 23...Nxe5 24.dxe5 R5d7 25.Qf4 h6 26.b4 Qb8 27.Rxd7 Rxd7 28.Rc6 Qb7 29.Rc5 Kh7 30.Qc4 g6 31.a3 Kg7 32.Rc6 Qb5 33.Qxb5 axb5 34.Rc5 Rd3 35.Rxb5 Rxa3 23... f6 was rated at +1.59. |
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| Sep-02-10 | | BOSTER: <Once> <a combination of tactical themes. ...Anything else?>
I don't want to argue with you. But my point is: if you combine six (not seven!) different colors , you can not get white. |
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| Sep-02-10 | | Brandon plays: I think I got it. Rh4+ Kg8 Rc4 and Black is sort of screwed.;) |
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| Sep-02-10 | | Patriot: <<BOSTER>: <Once> <a combination of tactical themes. ...Anything else?> I don't want to argue with you. But my point is: if you combine six (not seven!) different colors , you can not get white.> The solution is a sequence of moves that force either a win of material or mate. How is it not a combo? |
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| Sep-03-10 | | you vs yourself: <Once> You have a beautiful writing style. I'm going have to back and read more of your posts! |
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