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Mar-18-10
 | | chrisowen: The prodigy beats Keith. 38.Rb5 and reality's black is out of space.It is an omen this 12.a4 inches hunt of the dark knight. What evil lurks
in the a6 pawn. From pole to pole the bishop gets punked..Bc7 Rb7 taking the rook is poisson Ba5 Rxa7. So white's a chip off the old block,
good stuff. Everybody in the place 38.Rb5 lets go. |
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| Mar-18-10 | | jackpawn: The puzzles must be easier this week, I got every one so far in a few seconds. Normally by Thursday I begin to have problems. |
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| Mar-18-10 | | remolino: 38.Rb5 is the obvious answer. But I bet it would have been much trickier to find had we not been told this is a puzzle. Easy to just grab the pawn OTB, especially in blitz or over coffee. |
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Mar-18-10
 | | NM JRousselle: I hear a lot of you saying this was too easy for a Thursday (and I agree that it is too easy). Are you the same guys who complain when the side to move does not have a clear win? |
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| Mar-18-10 | | patzer2: While I found 38. Rb5! to be an easy passed pawn combination for a Thursday, it might have something to with the fact that I've made a hobby of solving Chess puzzles for over thirty years. However, for a novice this might be difficult. So, I'm willing to take an easy one at mid-week ever now and then for the benefit of others. Also, it saves time when I need to do something other than Chess. Thanks again chessgames.com for all you do to make Chess entertaining and instructive for all players, from novices to Masters. I, for one, appreciate your efforts. |
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| Mar-18-10 | | lzromeu: <jackpawn: ... easier this week ... Normally by Thursday I begin to have problems.>
I agree. |
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| Mar-18-10 | | stanleys: I've solved many similar combinations recently from a book by the French FM Xavier Parmentier - so this one wasn't a problem :) |
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| Mar-18-10 | | kevin86: The knight cannot stop both pawns-so white played to catch the bishop for the rook.In the end,black cannot stop both pawn without losing both pieces. |
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| Mar-18-10 | | YouRang: Well, that wasn't so hard. Surely it must be about converting one of white's promotion threats (a-pawn or d-pawn). With that in mind, white would love to exchange her rook for the black bishop on b6, because recapturing with black's a7 pawn lets the white a-pawn run. So 38.Rb5 (threatening Rxb7) is pretty clear. Now, the bishop has no safe place to go on the a7-f2 diagonal, so 38...Bc7 is forced. But then 39.Rb7! because white would be just as happy to exchange the rook for black's knight, since 39...Nxb7 40.axb7 gives white 2 pawns ready to promote, and the bishop is inadequate to stop both. In any case, either the bishop or the a7 pawn must fall, and black's game will fall with it. |
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| Mar-18-10 | | David2009: Thursday 18/03/2010 puzzle Judit Polgar vs Arkell, 1988 White 38? 38 Rb5 makes progress. 38...d4 is two moves too slow after 39 Rxb6 dxc3 49 Rb8, so
38...Bc7 is forced, allowing 39 Rb8 Ba5 (but not 39...Nxb7?? 40 axb7 Kf8 41 d8=Q+ Bxd8 42 b8=Q winning easily)
40 Rxa7 Kf8 (not 40...Bxc3?? 41 Ra8 Ba5 (or f6) 42 Rxd8+ Bxd8 43 a7 etc) 41 Rc7 Bb6 (now we see why Bh5 is better
than Be5) 42 a7 Bxa7 43 Rxa7 Ke7 and Black, having proved his point by preventing an immediate Pawn promotion, can now resign with
honour aftr White's next move.
I only need to calculate as far as 40 Rxa7, but it will be interesting to see how much of these variations stand up against Crafty.
Time to check:
=====
Yes. I'll set it up against Crafty if and when time allows. |
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| Mar-18-10 | | Chessdreamer: Event incorrect.
[Event "Duncan Lawrie World Mixed Challenge"]
[Site "London"]
[Date "1988.10.22"]
[Round "1"]
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[WhiteElo "2365"]
[BlackElo "2430"]
--------- |
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| Mar-18-10 | | wals: Rybka 3 1-cpu : 3071mb hash: depth 24:
White's error
31.a6 +0.86, better was Bh4 +1.95.
Black's errors
32...Rd5 +2.54, better was Ne5 + 0.85.
37...Bb6 + 7.14,better was Be7 +2.62. |
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| Mar-18-10 | | jitesh: on move 26,why does black refuse to take white pawn on d6?
Why not 26..exd6 ? |
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| Mar-18-10 | | David2009: The decisive blunder was 37...Bb6. 37...Be7 is much better e.g. 38.Rb5 Kf8 39.Rb8 Kg7 40.Rb7 Bc5 41.Rc7 Bb6 42.Rb7 Bc5 1/2 - 1/2 by repetition. In the game Black resigned after 38.Rb5 Bc7 39.Rb7 Ba5 40.Rxa7 (the time control?). The decision to resign was undoubtedly correct, since the win in a tournament game is only a matter of time. However my previous post Judit Polgar vs Arkell, 1988
did NOT find the toughest resistance: this is provided by 40...Nc6! 41.Rb7 Kf8 42.a7 Nxa7 43.Rxa7 Bd8 44.Kf1 Ke7 with a blockade: but after 45.Ke2 Black can only wait and hope for White to make a mistake.
Crafty defends with 45...h3 46 Kd3 h4 47 Rb7 Kd6 48 Rb8 Kxd7 49 Rxd8+ Kxd8 50 Kd4 1-0 (the Pawn ending is easily won). On-line Crafty links to the position at move 33 
click for larger view (Polgar vs Arkell 1988, 33?)
http://www.chessvideos.tv/endgame-t...
and the puzzle position:
http://www.chessvideos.tv/endgame-t...
In both you are white, drag and drop the move you want to make. Winning the first (if it can be won at all) is a real challenge: Crafty agrees with the game line for Black until move 37 then improves. |
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| Mar-18-10 | | VincentL: The move here is surely 38. Rb5.
Black cannot now parry all the threats, and either the a pawn or the d pawn will queen. For example:
38.......Bc7 39. Rb7. If 39...Nxb7 40. axb7 and either the b pawn or the d pawn will
promote to queen without capture.
If 39....Nc6 40. Rxc7 and the d pawn will queen.
If 39....Ba5/Be5 40. Rxa7 and again one of the white pawns will queen. After 38......Nc6 39. Rxb6 axb5 40. a7 and again either the a pawn or the d pawn will queen. After 38.... Some other move 39. Rxb6+ axb6 40. a7 and the a pawn will queen. Time to check. |
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| Mar-18-10 | | vanytchouck: i fail to see the difficulty, rather a tuesday puzzle.
Maybe there is a trick and the rook has to stay under the threat of the bishop? Ok, let's see the obvious 38. Rb5 (the threat is 39. Rxb6 and 40. a7 the Nd8 can't stop this pawn) 38. Rb5 Bc7 (no choice)
39. Rb7 the same idea as Nxb7 leads to a Bc7 unable to stop both the " b " and " d " pawn.
39...B anywhere (i don't care)
40. Rxa7 Kg7
41. Ra8 (threatening 42. Rxd8 and 43. a7 winning)Nc6
42. d8=Q Bxd8 (or Nxd8)
43. Rxd8 Nxd8 (or Bxd8)
44. a7 1-0.
if 40...Kf8 then 41. Ra8, 42. Rxd8 and 43. a7 etc. |
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| Mar-18-10 | | ChessKnightsOfLondon: I Presume Rb5 then taking the Bishop wins, 2 Advanced pawns must win. |
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| Mar-18-10 | | TheaN: <David2009: However my previous post Judit Polgar vs Arkell, 1988 did NOT find the toughest resistance: this is provided by 40...Nc6! 41.Rb7 Kf8 42.a7.../snip> Nice defense, missed the fact that d8 is of course defended twice, but it isn't too hard to see that White wins easily with <41.Ra8†! Kg7>, any interposition is of course taboo due to a capture, and now <42.Rc8  > wins because of a simple attack on the Knight, which moves is irrelevant, after Na7 White can just promote. Probably easier than yours (didn't check it :P). |
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| Mar-18-10 | | Utopian2020: Solved this one in a nanosecond. I'm sure CG will compensate for it on Friday. |
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| Mar-18-10 | | MaxxLange: a relatively quiet pawn promotion combination against The Keith Arkell, a good practical tactics problem. |
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| Mar-18-10 | | turbo231: I didn't get shut out! I finally solved a puzzle, the first one this week. That makes me feel good. Today's puzzle seems to be the easiest one this week. More like a easy Monday puzzle. But i'll take it, any thing is better than nothing! |
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| Mar-18-10 | | AlexanderG: Can anyone explain why Arkell played 26..e6 creating a passed pawn? 26..exd6 would have removed the pawn. And then with 29..Nxc3, he created two connected passed pawns. What was he thinking? |
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| Mar-18-10 | | Quentinc: <Can anyone explain why Arkell played 26..e6 creating a passed pawn?> See <Obit's> educated guess on page 1 (where I asked the same question). I found this easy for a Thursday, but I'm not down with the "too easy" crowd. It was a fascinating solution and so well worth my time. |
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| Mar-20-10 | | Albertan: <<AlexanderG: Can anyone explain why Arkell played 26..e6 creating a passed pawn? 26..exd6 would have removed the pawn. And then with 29..Nxc3, he created two connected passed pawns. What was he thinking??> He played 26....e6 so he could move a knight to d5.However,Arkell in fact played the wrong knight to e5 in this game on move 27. 27...Nfd5?! is dubious according to Deep Rybka 3. Instead after 27...Nbd5 28.Bh2 Ne4 29.Nd4 Bxd4 30.Rxd4 Nxd6 31.Nc5 Rc7 according to Deep Rybka 3 black is okay. Note that if Polgar had played 27.Bg3 after 26...e6 then 27...Ne4 is good for black. |
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| Aug-17-20 | | Octavia: Von 32. d7 die Partie ist in Judit Polgar lehrt Schach 1 |
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