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MatPlus.Net Forum Promenade Game rules are evil :-)
 
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(1) Posted by Siegfried Hornecker [Monday, May 3, 2010 19:06]

Game rules are evil :-)


SH, original
(= 2+1 )

h#2
Game rules

1.Ka7 b8Q+ 2.Ka8!! Kc7 mate

White does not need to claim an illegal move...

http://arbitri.lombardiascacchi.com/Chesscafe/2010_02.pdf
 
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(2) Posted by Miodrag Mladenović [Monday, May 3, 2010 19:17]

But there are many cooks :) in your problem:

1.Ka7 Kc7 2.Ka8 b8Q#
1.Kc7 Ke6 2.Kd8 b8Q#
1.Kc8 Ke6 2.Kd8 b8Q#

Unless white claims illegal move in the cooks!
 
 
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(3) Posted by Siegfried Hornecker [Monday, May 3, 2010 19:31]; edited by Siegfried Hornecker [10-05-03]

Well, Misha, the game has already ended in my first posting. No possibility to play the other variations. :-)

No, just wanted to demonstrate that, didn't specifically build a position for it.

Anyway:
(= 2+1 )

This should be correct (I hope), h#1 by 1.Ka8 b8Q
 
   
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(4) Posted by Bojan Basic [Tuesday, May 4, 2010 02:59]

 QUOTE 
This should be correct (I hope), h#1 by 1.Ka8 b8Q

Why not e.g. 1. Ka8 b7=Q? In other words: if you allow illegal moves, the number of possible solutions is close to infinity.
 
   
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(5) Posted by Siegfried Hornecker [Tuesday, May 4, 2010 03:03]

Ok, you got a point I didn't even think about! That's right and thus the topic is done for me.
 
   
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(6) Posted by Juraj Lörinc [Tuesday, May 4, 2010 14:01]

Regarding the example composing tries above - do not forget the Bratislava chess (also known as Pressburg chess): a piece may stay in check or come into check, if it is not a mate (in the usual sense). A king might be placed adjacent to opposite king, if it is guarded.

Invented by Bedrich Formanek. I tried a few compositions in Bratislava chess, but it was too cook prone for my ideas.
 
 
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(7) Posted by Joost de Heer [Tuesday, May 4, 2010 21:08]

[wKc7 wPb7 bKa7]
1. Ka8 b8=Q isn't mate, since black can play 2. Ke2!
 
   
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(8) Posted by Nikola Predrag [Tuesday, May 4, 2010 22:09]

1. Ka7xc7
 
 
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(9) Posted by Siegfried Hornecker [Tuesday, May 4, 2010 23:00]

Mate ends the game if the move that gives checkmate is legal. So black can't play 2...Ke2. As I said, it is not necessary to claim illegal moves, but it is possible.

That's probably the reason why helpmates are fairy problems.
 
   
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(10) Posted by Nikola Predrag [Tuesday, May 4, 2010 23:40]

So you think that after illegal (but not claimed) 1. Ka8, 1...b7-b8Q is clearly a legal move
 
   
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(11) Posted by Siegfried Hornecker [Wednesday, May 5, 2010 02:26]

Yes, see the linked PDF at the beginning of the thread.
 
   
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(12) Posted by Hauke Reddmann [Wednesday, May 5, 2010 16:58]

I might add some more pointlessness :-)
Cf. the bottom of this page:
http://www.bambam42.de/is/is97/s03.html

Hauke
 
   
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(13) Posted by Siegfried Hornecker [Wednesday, May 5, 2010 17:03]

Hauke, you're posting here with an Atari?
 
   
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(14) Posted by Hauke Reddmann [Friday, May 7, 2010 12:14]

There's nothing to say against an Atari, the proggie sizes
were 1% of that an equivalent Windows proggie. The graphics
"Which masked Theme H variants are possible" lead me to
the discovery of a fourth one, independent of Wieland.
Made that on my Atari. Wrote my dissertation on it, too.
Yes, you can even go into Internet with an Atari.
There is only one reason which made me change to Windows
(look at the time stamp - 1997- PC stone age),
but it's none to be blathered about on a chess forum ;-)))

Hauke
 
 
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MatPlus.Net Forum Promenade Game rules are evil :-)