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MatPlus.Net Forum General In BrunnerChess,
 
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(1) Posted by Eugene Rosner [Friday, Feb 10, 2017 00:46]; edited by Eugene Rosner [17-02-10]

In BrunnerChess,


(= 5+3 )

why is 1.Kd2 the only solution to #1?
wouldn't Ke3,Ke2,Kc4 mate as well?
 
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(2) Posted by Eugene Rosner [Friday, Feb 10, 2017 03:51]; edited by Eugene Rosner [17-02-10]

I guess 1.Kc4+? Bg8+! and now Sxh8/Rxh8? because the wK is in check? and 1...Bg8 is not an illegal selfcheck?
 
 
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(3) Posted by Geoff Foster [Friday, Feb 10, 2017 05:46]

Popeye gives 1.Kc4+? Bg8!; 1.Ke3+? Rxe7!; 1.Ke2+? Rxe7!
 
   
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(4) Posted by Sarah Hornecker [Friday, Feb 17, 2017 23:51]

http://www.dieschwalbe.de/lexikon.htm#sectionB

 QUOTE 
Brunnerschach = Kontraschach: Eine Partei darf den gegnerischen König nur dann schlagen, wenn der eigene nicht postwendend vom Gegner geschlagen werden könnte. Die Drohung des Königsschlages kann also mit der Drohung des unmittelbaren "Gegenschlags" pariert werden oder droht von vornherein nicht wegen Gegenschlags. Auf diese Weise ist direkter Kontakt der Könige möglich; sind beide Könige gedeckt, dann sogar ohne dass Schach besteht. Ein gedeckter König kann einen ungedeckten König durch Königskontakt matt setzen. Schlag (und Gegenschlag) des Königs kommen wie im normalen Schach nicht tatsächlich zur Ausführung.


Thanks to Hans Gruber's work, I can give the definition here.

Condensing the above translates to:
An opposing king can only be captured if the opponent can not capture the own king. As an extreme example, both kings can stand next to each other without giving check if both are protected (as the opponent always could re-capture). Capture and counter-capture are - just like in standard chess - not really played.
 
 
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MatPlus.Net Forum General In BrunnerChess,