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

### 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

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!

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

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.

Ok, you got a point I didn't even think about! That's right and thus the topic is done for me.

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.

[wKc7 wPb7 bKa7]
1. Ka8 b8=Q isn't mate, since black can play 2. Ke2!

1. Ka7xc7

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.

So you think that after illegal (but not claimed) 1. Ka8, 1...b7-b8Q is clearly a legal move

I might add some more pointlessness :-)
http://www.bambam42.de/is/is97/s03.html

Hauke

Hauke, you're posting here with an Atari?

There's nothing to say against an Atari, the proggie sizes
were 1% of that an equivalent Windows proggie. The graphics
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