Author: Uri Blass
Date: 13:46:58 02/22/05
Go up one level in this thread
On February 22, 2005 at 15:30:49, Scott Gasch wrote:
>On February 22, 2005 at 13:14:09, Uri Blass wrote:
>
>>On February 22, 2005 at 08:35:07, Andrew Wagner wrote:
>>
>>>Hi all.
>>>I got sidetracked this morning by an interesting chess programming problem. It
>>>took me a couple hours, but I think I have a working algorithm -- haven't tested
>>>yet though. Anyway, I got to wondering if others would approach it the same way.
>>>So I thought I'd make a little competition of it. Post your code here, and I'll
>>>pick the program I like best and shower praise and adulation on its author. If
>>>people like this challenge, maybe I'll do one each month or something. Anyway,
>>>here's the one I did this morning:
>>>There are 64 x 63 = 4032 ways to put a black knight and white knoght both on a
>>>chess board. Write a program -- from scratch -- to generate FENs for each of
>>>these positions. The FENs should look something like: Nn6/8/8/8/8/8/8/8 w - - 0
>>>1.
>>>
>>>I think my code will wind up weighing in at around 60-70 lines of C. Can you do
>>>better?
>>
>>Here is my code(not 100% sure of no bugs)
>>
>>It seems that there are better codes
>>based on looking at other codes
>>
>>#include <stdio.h>
>>int main(void)
>>{
>>int whiteknight,blackknight,rank,N,n,empty1,empty2,empty3;
>>char c1,c2;
>>for (whiteknight=0;whiteknight<64;whiteknight++)
>> for (blackknight=0;blackknight<64;blackknight++)
>> if (whiteknight!=blackknight)
>> {
>> for (rank=7;rank>=0;rank--)
>> {
>> N=8;
>> n=8;
>> if ((whiteknight>>3)==rank)
>> N=whiteknight&7;
>> if ((blackknight>>3)==rank)
>> n=blackknight&7;
>> if (n<N)
>> {
>> empty1=n;
>> empty2=N-n-1;
>> empty3=7-N;
>> c1='n';
>> c2='N';
>> }
>> else
>> {
>> empty1=N;
>> empty2=n-N-1;
>> empty3=7-n;
>> c1='N';
>> c2='n';
>> }
>> if (empty1>0)
>> printf("%d",empty1);
>> if (empty1<8)
>> printf("%c",c1);
>> if (empty2>0)
>> printf("%d",empty2);
>> if (empty3>=0)
>> printf("%c",c2);
>> if (empty3>0)
>> printf("%d",empty3);
>> if (rank>0)
>> printf("/");
>> }
>> printf(" w - - 0 1\n");
>> }
>> return 0;
>>}
>>
>>Uri
>
>[ scott@wannabe:~/tmp ] % g++34 -O -S aaa.c ; wc -l aaa.s
> 196 aaa.s
I do not understand what you want to say.
I thought first that you accidentally posted some meaningless string for me but
I see now that you did the same in response to code of other people.
Uri
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