Author: martin fierz
Date: 03:17:09 02/08/01
Go up one level in this thread
On February 08, 2001 at 05:26:40, Uri Blass wrote:
>On February 08, 2001 at 04:24:11, David Blackman wrote:
>
>>On February 07, 2001 at 16:41:28, Tanya Deborah wrote:
>>
>>>
>>>
>>>Hi!
>>>
>>>I am playing a new match in checkers between the 2 strongest Spanish checkers
>>>programs of the world...
>>
>>Just curious, is "Spanish checkers" the same game as "Polish Draughts",
>>"International Draughts", "Damen" etc?
there are about a zillion different rules for checkers - a nice overview can be
found on
http://www.triplejump.net/rules.shtml
>>According to people who have tried, it is a bit harder to
>>write a strong program
>>for it than for chess.
>
>I think that the opposite is truth.
>I remember that I read that chinook won against the world champion in this game
>before Deeper blue(I read that the result was 2:1 and 67 draws).
it depends on the variation. the main differences are the board sizes (8x8,
10x10 and even 12x12), and the rule for kings. in some variations, kings move
like kings in chess, in others, like queens. of course the queens-variation
allows many more moves than the kings-variation. if you play a queens-variation
on a 10x10 board ('international checkers', 20 pieces each) you have *much* more
complexity than if you play a kings-variation on an 8x8 board (as my program
does, 'straight checkers'). i think vincent diepeveen's checkers program plays
international checkers, so he might be able to tell us what the difference in
branching factor is compared to chess. in straight checkers you get *lots* of
draws. chinook never really beat the world champion (tinsley) over the board,
tinsley got ill during the rematch (he won the first match) after six draws and
forfeited his title. he died shortly after this. chinook then won a match
against the world number two with a close result.
the whole story can be read in schaeffer's book 'one jump ahead'.
in straight checkers, computers are better than humans, i don't know about
international checkers.
cheers
martin
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