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MatPlus.Net Forum General A spin on an old idea
 
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(1) Posted by Rewan Demontay (Real Name: James Malcom) [Wednesday, Oct 21, 2020 16:31]

A spin on an old idea


The title should give away, if not the position. Give this one a go!

Mate In 12
(-:
(= 9+13 )


Feel free to share any other spins on old ideas that exist.
 
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(2) Posted by Joost de Heer [Wednesday, Oct 21, 2020 20:26]

Illegal position (8 black pawns and Bc1 is promoted).
 
 
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(3) Posted by Rewan Demontay (Real Name: James Malcom) [Wednesday, Oct 21, 2020 20:51]

Whoops!-fixed with a different scheme.
 
   
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(4) Posted by Frank Richter [Thursday, Oct 22, 2020 16:08]

Illegal position: White pawns need 3 captures, but Bf8 could never have been captured ...
 
   
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(5) Posted by Rewan Demontay (Real Name: James Malcom) [Thursday, Oct 22, 2020 17:11]

Replaced a pawn with a bishop-somehow I've been far too blind.
 
   
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(6) Posted by Jacques Rotenberg [Thursday, Oct 22, 2020 18:45]

???
 
   
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(7) Posted by Siegfried Hornecker [Thursday, Oct 22, 2020 19:07]

James, we greatly enjoy your corrections, but we would enjoy them even more if you would also post them here with new diagrams (in the original post or a reply). :-)

Otherwise, it is kind of mental gymnastics to figure out what new scheme you tried.
Or did you do so, and the original post doesn't show anymore that you edited it? For me that notification seems gone on my posts.
 
   
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(8) Posted by Rewan Demontay (Real Name: James Malcom) [Friday, Oct 23, 2020 05:09]

Oh, I forget to re-edit in the original diagram. Sorry Siegfried!
 
   
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(9) Posted by Jacques Rotenberg [Friday, Oct 23, 2020 09:19]

Solution ?
 
   
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(10) Posted by Frank Richter [Friday, Oct 23, 2020 09:52]

1.a8=blackN
 
   
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(11) Posted by Jacques Rotenberg [Friday, Oct 23, 2020 10:40]

I did not follow what happens here!
Thank you!
 
   
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(12) Posted by Jacques Rotenberg [Friday, Oct 23, 2020 13:22]

if so, the diagram with a white pawn b3 seems legal too... the 8th white pawn promoted to black to be captured by a white pawn
 
   
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(13) Posted by Andrew Buchanan [Friday, Oct 23, 2020 17:17]

Yes Jacques! :) or bPh8xg7!
 
   
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(14) Posted by Rewan Demontay (Real Name: James Malcom) [Friday, Oct 23, 2020 17:21]

Congratulations on solving Frank!

In regards to the legality, Jacques and Andrew, I find it "preferable" to have the position be legal without the joke involved.
 
   
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(15) Posted by Andrew Buchanan [Friday, Oct 23, 2020 19:40]

Good call, James: if you had an illegal diagram, it would be an assertion that it couldn't be made legal, which is not the case :)
 
   
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(16) Posted by Jacques Rotenberg [Saturday, Oct 24, 2020 19:43]

Well, James, you may be right, and maybe not.
To have your special promotee in the actual play and in the retro play is the so called Alice idea, when the same thing happens "on the two sides of the mirror".
 
 
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MatPlus.Net Forum General A spin on an old idea