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(1) Posted by Eugene Rosner [Friday, Jun 28, 2013 05:54] |
traditional #2 with 3 black selfpins on one square Hi Everyone-
I've been working on a new type of #2 schematic and I'm looking for already composed examples of twomovers where after the key, black defends against a threat by selfpinning on one square. I'm looking for previously composed problems where black places 3 different pieces on one square pinning itself each time. Could anyone supply examples?
thanks! |
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(2) Posted by Ian Shanahan [Friday, Jun 28, 2013 07:42] |
Hi Eugene. Isn't this the Schiffman theme? Or do you have something else in mind? |
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(3) Posted by Juraj Lörinc [Friday, Jun 28, 2013 09:53] |
Not necessarily Schiffmann. It requires threat battery mate with defence motif of unpin by firing piece causing guard by unpinned black defender. The cousin Nietvelt defence is similar and selfpin can have many other defence motifs (capture of mating piece, unguard by capture, opening line and selfpin only incindental etc.). |
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(4) Posted by Eugene Rosner [Friday, Jun 28, 2013 14:07] |
yes, I do have something else in mind Ian! Juraj-you are exactly right. you can throw in pin of threat piece as well! Any examples by chance? |
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(5) Posted by seetharaman kalyan [Friday, Jun 28, 2013 15:05]; edited by seetharaman kalyan [13-06-28] |
I believe changed mates after three black selfpins (on the same square) has been done a few times. So, just a postkey play will be anticipated. Six selfpins on the same square (capture by different black pieces) is the record I believe. One nice example is by C.Mansfield (to be expected) in 1932 and it contains a seventh self pin on a different square. I can locate that if you want. |
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(6) Posted by Eugene Rosner [Friday, Jun 28, 2013 17:08] |
I just want to see how the selfpin mechanisms can work, so an examples of single phase problems would be fine. I'm working on several matrices currently(to treat the theme in a completely new way) but I just want to see how others have approached the general idea. |
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(7) Posted by seetharaman kalyan [Friday, Jun 28, 2013 17:47]; edited by seetharaman kalyan [13-06-28] |
C.Mansfield
Comm. Budapest Chess Club Ty., 1932-33
(= 11+14 )
#2 1. e:d4!
Six self-pins on d4, with additional selfpin after 1...R:f3.
This one by Stocchi is a classic, showing four changes. Selfpins in set and Stocchi blocks after the key ! http://www.yacpdb.org/?id=24379 |
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(8) Posted by René J. Millour [Friday, Jun 28, 2013 18:18] |
One of my first problems!
René J. Millour
Problème, 1964
(= 10+10 )
#2
1...QRBSxe5 2.Sf8#
1.Re1! [2.Sf8#]
1....Qxe5 2.Sd4#
1....Rcxe5 2.Qd5#
1....Rhxe5 2.Bf5#
1....Bxe5 2.Sc7#
1....Sfxe5 2.Bg8#
1....Sgxe5 2.Rg6# |
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(9) Posted by Eugene Rosner [Friday, Jun 28, 2013 23:00] |
thanks gentlemen! plenty to ponder here, much food for thought! |
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(10) Posted by Ian Shanahan [Saturday, Jun 29, 2013 05:37] |
Hi Eugene. The penny dropped! I think I can guess what you're up to... |
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(11) Posted by Harry Fougiaxis [Saturday, Jun 29, 2013 17:36] |
QUOTE This one by Stocchi is a classic, showing four changes. Selfpins in set and Stocchi blocks after the key ! http://www.yacpdb.org/?id=24379
The square-blocks in the solution are not Stocchi blocks. |
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(12) Posted by seetharaman kalyan [Sunday, Jun 30, 2013 07:24]; edited by seetharaman kalyan [13-06-30] |
You are right. Sorry for the oversight. Two of the selfblocks depend on unguards. |
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(13) Posted by Eugene Rosner [Friday, Jul 26, 2013 04:37] |
as Ian posted on 6/29, Hubert Gockel and I were able to achieve something new with 3 selfpins on 1 square. This may be viewed in the August 2013 Die Schwalbe. A very happy ending after a month's composing! Many matrices until we hit one that could work! I'm glad matplus is up and running that I could report this. The research you all supplied was quite helpful and inspirational! |
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