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Subject: Re: Basics of Group Theory for Chess Players A Ply

Author: chandler yergin

Date: 17:40:22 05/22/05

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On May 22, 2005 at 17:44:36, David Mitchell wrote:

>On May 22, 2005 at 06:08:42, chandler yergin wrote:
>
>>On May 22, 2005 at 05:30:44, Günther Simon wrote:
>>
>>>On May 22, 2005 at 05:22:09, chandler yergin wrote:
>>>
>>>>On May 22, 2005 at 04:41:24, chandler yergin wrote:
>>>>
>>>>>On May 20, 2005 at 22:15:59, Robin Smith wrote:
>>>>>
>>>>>>On May 20, 2005 at 13:24:29, chandler yergin wrote:
>>>>>>
>>>>>>>On May 20, 2005 at 12:26:50, E. Nielsen wrote:
>>>>>>>
>>>>>>>>On May 20, 2005 at 12:04:52, chandler yergin wrote:
>>>>>>>>
>>>>>>>>>Each move and its response is called a ply.
>>>>>>>>
>>>>>>>>NO!!! There are two plies per move. :)
>>>>
>>>>Do you disagree with this?
>>>>1. e4 is a move = 1 Ply
>>>>2. e5 as a response is 1 move = 1 Ply
>>>>
>>>
>>>gosh...of course this is wrong!
>>>1 ply = 1 _half_move and 2 plies are 1 move,
>>>time to get this.
>>>That's why it is 1.e4 and 1...e5 ;-) (not 2...e5)
>>>
>>>Guenther
>>
>> 1. e4 e5 you consider to be one move?
>>For Notation purposes yes, I agree
>>White makes a move = 1 Ply
>>Black responds with a move = 1 Ply
>>So for each move and response = 2 Ply.
>>OK?
>
>Actually, you're both right!
>
>The GENERAL meaning of "move" in FIDE regs is simply "a king can not move into
>check", etc. One player's moving of a piece, constitutes one move. I believed
>that would be called a "half move", but I just went to FIDE and it's called a
>move, period.
>
>However, there is another meaning for more specific meaning of "move", which I
>can not find in the FIDE regs., but is understood by chess players to mean,
>oddly enough, a pair of moves.
>
>So, 1. e4 is a general move, (normally easily told apart from the specific
>meaning of "move" by the context), however, 1. e4, e5 is also ONE move. With the
>latter clearly being TWO ply.
>
>Dave

http://www.chessbase.com/support/workshop.asp?ID=235



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