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MatPlus.Net Forum General Ask for help - Study
 
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(1) Posted by Sven Hendrik Lossin [Wednesday, Dec 11, 2013 10:03]

Ask for help - Study


I am working on an article and look for a study with the following theme:
As you might know there is no way to lose a tempo with a knight. I hope to find a study where White has a "wrong" knight that can move and a second knight that would do the job but for some reason cannot do the job. In the course of the solution White is able to activate the "right" knight by sacrificing the wrong one.
Anybody here who has seen something alike?
 
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(2) Posted by Sarah Hornecker [Wednesday, Dec 11, 2013 14:36]

I have seen a mate in six like that. But I don't remember the author or position.
 
 
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(3) Posted by Per Olin [Wednesday, Dec 11, 2013 18:26]

There should be over four decades of endgames stored on the hard disk between my ears. I don't immediately recall anything, so I do as we many times do - answer, but not the question.

It is possible to lose a tempo with a knight in a proof game, if the knight vanishes (is the definition for tempo that the same position is reached half a move later, i.e. the party to move has changed ?). Here an example, earlier unpublished.

Per Olin

Original

(= 15+14 )


Proof game in a) 4.5 moves b) 5.0 moves

Solution: a) 1. Nb1-c3 Pd7-d5 2. Nc3xd5 Pe7-e6 3. Nd5-e7 Nb8-d7 4. Ne7xg8 Rh8xg8 5. Pc2-c3
b) 1. Nb1-c3 Pd7-d5 2. Nc3xd5 Pe7-e6 3. Pc2-c3 Ng8-e7 4. Nd5xe7 Nb8-d7 5. Ne7-g8 Rh8xg8
 
   
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(4) Posted by Hauke Reddmann [Thursday, Dec 12, 2013 11:57]

@Siegfried - So did Sven-Hendrik and me, since the theme came up
at our last Lüneburg problem treff from viewing exactly that 6# ;-)

A possible simpler way to show the theme would be doing it as
<neudeutsch>Auswahl- statt Vorbereitungskombination</neudeutsch>,
think of something like Kd1 - Ka1 Pa2 Sc1 Sc2, draw. (Which doesn't
work, alas, since White loses regardless which knight he takes,
but you get the general idea.)

Hauke
 
   
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(5) Posted by Sven Hendrik Lossin [Thursday, Dec 12, 2013 15:12]

Well, Hauke, in fact it has been a s#7...
 
   
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(6) Posted by Hauke Reddmann [Sunday, Dec 15, 2013 19:25]

I SAID I don't remember. If you remember, fine :-)
 
 
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MatPlus.Net Forum General Ask for help - Study