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Homemade puzzles [1]: Constrictor
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Knight  Joined: Wed Jun 11, 2008 12:54 am Posts: 82 Location: Romania Rating: unrated Rating Class: Class B (1600-1800) 
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 Homemade puzzles [1]: ConstrictorWhite to play and win
EDIT: diagram corrected with the final form of the puzzle!! (black pawn to a6 instead of a7) As usual, your comments are welcome and the following questions are open: Is it tough? Is it enjoyable? Small hint for opening the appetite for this puzzle: Do not be afraid to use a computer as tactics guidance in finding the solution: the puzzle is intended to be tough for computers!  Hidden Text Below - [Show it] - [Hide it Again] _________________ 2 plus 2 is 5 for large values of 2 Last edited by Kornrade on Wed Dec 16, 2009 4:45 pm, edited 3 times in total. |
| Tue May 12, 2009 3:35 pm |
 
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Knight Joined: Wed Jun 11, 2008 12:54 am Posts: 82 Location: Romania Rating: unrated Rating Class: Class B (1600-1800)
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Re: Constrictor [my first study] What is wrong with the puzzle, to start with? Too many pieces? Too unnatural position? Is the puzzle so ugly that it scares off everyone? _________________ 2 plus 2 is 5 for large values of 2 |
| Thu May 21, 2009 1:45 am |
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Site Moderator   Joined: Mon Feb 04, 2008 3:48 pm Posts: 1516 Location: Germany Rating Class: Class B (1600-1800)
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Re: Constrictor [my first study] I just couldn't find a win
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| Thu May 21, 2009 4:50 am |
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King  Joined: Sat May 12, 2007 12:19 pm Posts: 1783 Location: Los Angeles Rating Class: Expert (2000-2200)
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Re: Constrictor [my first study] right off the bat Qg7+ and Qxd3 pose problems for white. white's only trump is the e-pawn. intuitively i would not think there is a clear win here, white's pieces are discombobulated and king is exposed.
if there is a win, it seems it would start with e5-e6. 1.e6 Qg7, 2.Kf3 Qxh6, 3.Nd4 c5 4.e7+ Ke8 5.Nf5 1.e6 Qxd3 2.Nd4 and now black has too much choice. i'm at work and can't use a board or spend any more time on this. looks difficult anyway!  _________________ talkin bout PRACTICE http://www.chessvideos.tv/forum/viewtopic.php?p=63877#p63877 |
| Thu May 21, 2009 9:18 am |
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Knight Joined: Wed Jun 11, 2008 12:54 am Posts: 82 Location: Romania Rating: unrated Rating Class: Class B (1600-1800)
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Re: Constrictor [my first study] Do not be afraid to use a computer as tactics guidance in finding the solution: the puzzle is intended to be tough for computers!
[I continue testing variations besides the main line = intended solution, and so far all lead to a clear win for black...]Indeed, Qg7+ and Qxd3 are the main moves for black. White has to coordinate his pieces (or what's left of them after black's second move), and he needs to do this quickly  1.e6 Qxd3 2.Nd4 Qd2+ {-+} wins the rook and the game Hint: Hidden Text Below - [Show it] - [Hide it Again] _________________ 2 plus 2 is 5 for large values of 2 |
| Thu May 21, 2009 2:35 pm |
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Premium Member   Joined: Thu Jan 03, 2008 6:21 am Posts: 1153 Location: Iceland Rating: 2330 Rating Class: FIDE Master
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Re: Constrictor [my first study] Too hard. Just can't see any ideas....and the few that came to mind took like 15 seconds to find some faults with
_________________ Visit me on zibbit64.blogspot.com |
| Fri May 22, 2009 1:34 am |
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Knight Joined: Wed Jun 11, 2008 12:54 am Posts: 82 Location: Romania Rating: unrated Rating Class: Class B (1600-1800)
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Re: Constrictor [my first study] OK, then I'll post the main line with few comments:
Hidden Text Below - [Show it] - [Hide it Again] Can you find something wrong with it? _________________ 2 plus 2 is 5 for large values of 2 Last edited by Kornrade on Fri May 29, 2009 1:06 am, edited 1 time in total. |
| Fri May 22, 2009 2:52 am |
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Premium Member Joined: Thu Jan 03, 2008 6:21 am Posts: 1153 Location: Iceland Rating: 2330 Rating Class: FIDE Master
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Re: Constrictor [my first study] Yeah it seems good. I was trying to find similar ideas but couldn't come up with it.
_________________ Visit me on zibbit64.blogspot.com |
| Fri May 22, 2009 1:32 pm |
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Knight Joined: Wed Jun 11, 2008 12:54 am Posts: 82 Location: Romania Rating: unrated Rating Class: Class B (1600-1800)
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Re: Constrictor [my first study] Unfortunately, there is one line whre black barely holds on by just one(!) tempo, as found here
To correct the puzzle, the a7 pawn need to be moved (e.g. to a6 or a5), which kills a whole tree of variations, but hopefully the study remains enjoyable. The Study in its new form has been the subject of a small article [in German]: http://glareanverlag.wordpress.com/2009 ... n_neghina/ _________________ 2 plus 2 is 5 for large values of 2 |
| Tue Sep 29, 2009 12:42 am |
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Knight Joined: Wed Jun 11, 2008 12:54 am Posts: 82 Location: Romania Rating: unrated Rating Class: Class B (1600-1800)
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Re: Constrictor [my first study] The full story of the puzzle through the forums can be read here
_________________ 2 plus 2 is 5 for large values of 2 |
| Thu Oct 08, 2009 4:04 am |
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