Talk:Generate Chess960 starting position: Difference between revisions
m →random starting position: added comments about verifying that all possible starting positions can be generated. |
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However, I believe the spirit of the requirement of ''random'' be that the random position would produce ''any'' of the 960 ''possible'' starting positions. -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 04:53, 8 May 2014 (UTC)
:[http://www.xkcd.com/221/ relevant] :-) --[[User:Grondilu|Grondilu]] ([[User talk:Grondilu|talk]]) 05:49, 8 May 2014 (UTC)
To this end, I wrote a REXX program (2<sup>nd</sup> programming entry) that randomly generates all possible unique 960 Chess960 starting positions and it shows a log of the results (unique starting positions) after each one-thousand generations.
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Revision as of 05:49, 8 May 2014
clarifying wording
In the first rule, the wording states ··· all eight pawns must be placed on the second rank.
There are sixteen pawns.
How about A player's eight pawns must be ··· or something similar. -- Gerard Schildberger (talk) 04:53, 8 May 2014 (UTC)
random starting position
A trivial REXX program (of two statements): <lang rexx>if random(0,1) then say 'NBQRBKNR'
else say 'QBNRBKNR'</lang>
would, in the strictest sense, fullfill a random Chess960 starting position (albeit only two random positions).
However, I believe the spirit of the requirement of random be that the random position would produce any of the 960 possible starting positions. -- Gerard Schildberger (talk) 04:53, 8 May 2014 (UTC)
To this end, I wrote a REXX program (2nd programming entry) that randomly generates all possible unique 960 Chess960 starting positions and it shows a log of the results (unique starting positions) after each one-thousand generations.
This would make a good extension to the requirements to verify that the programming examples being used to create a random Chess960 starting position do indeed produce all possible starting positions. -- Gerard Schildberger (talk) 05:42, 8 May 2014 (UTC)