Author: Dann Corbit
Date: 18:18:55 05/22/01
Go up one level in this thread
On May 22, 2001 at 20:46:36, James T. Walker wrote:
[snip]
>Hello Dann,
>Of course I agree with your numbers since they are based on solid math
>principles. The problem is this same "excuse" has been used since I first came
>here about 3.5 years ago and started testing Crafty 14.something. It was
>approximately 150 points behind the latest commercial programs then and as near
>as I can tell it's about the same distance behind now. Of course you can use
>the uncertainty factor to explain that they may be closer than the numbers show
>but that has been the same excuse for 3 years. I think if anything the past 3
>years has shown that the data is more reliable than you are willing to accept.
>Yes you change commercial programs every year or two and Crafty changes every
>month or less so you will always have this "excuse".
Well, you might be right. I suspect that a lot of crafty's losses are book
losses. In any case, I still think the difference is not very great between the
top professional programs and the top amateur ones. Given a commercial quality
opening book and a properly tuned platform, I think there is evidence that they
can compete on equal footing (see the last CCC combat zone where Crafty won).
On the other hand, this is not strictly scientific and I am doing a great deal
of extrapolation.
>The problem with your
>uncertainty factor is that they have never merged together as you indicate they
>possibly could. I have no doubt that Bob is leading the way in several areas
>concerning chess programming and a lot of programmers are following his lead in
>these areas but to me it is obvious by now that Crafty's strength overall is
>still lagging behind the top commercial programs. I have my own database of
>over 12000 games now and several versions of Crafty are included and the data
>shows that Crafty is improving at about the same rate as the top commercial
>programs in computer vs computer games. I don't have a clue about computer vs
>human contest since I believe this is very different and does not necessarily
>follow the comp vs comp statistics. In any case we can agree to not agree on
>this and there is no need to argue about it. Believe me if/when Crafty tops the
>SSDF list I will be one of the loudest in cheering. I will also cheer when
>Ferrett becomes available to the public.
I think we missed the last chance on 10/13/2000 so we will have to wait until
9/13/2019 at the earliest.
E:\nr\fixed>type badluk.c
#include "nr.h"
#define ZON -5.0
#define IYBEG 2000
#define IYEND 2100
int main(void)
{ /* Program BADLUK */
int ic, icon, idwk, im, iyyy, n;
double timzon = ZON / 24.0, frac;
long jd, jday;
printf ("\nFull moons on Friday the 13th from %5d to %5d\n", IYBEG, IYEND);
for (iyyy = IYBEG; iyyy <= IYEND; iyyy++)
{
for (im = 1; im <= 12; im++)
{
jday = julday (im, 13, iyyy);
idwk = (int) ((jday + 1) % 7);
if (idwk == 5)
{
n = (int) (12.37 * (iyyy - 1900 + (im - 0.5) / 12.0));
icon = 0;
for (;;)
{
flmoon (n, 2, &jd, &frac);
frac = 24.0 * (frac + timzon);
if (frac < 0.0)
{
--jd;
frac += 24.0;
}
if (frac > 12.0)
{
++jd;
frac -= 12.0;
}
else
frac += 12.0;
if (jd == jday)
{
printf ("\n%2d/13/%4d\n", im, iyyy);
printf ("%s %5.1f %s\n", "Full moon", frac,
" hrs after midnight (EST)");
break;
}
else
{
ic = (jday >= jd ? 1 : -1);
if (ic == (-icon))
break;
icon = ic;
n += ic;
}
}
}
}
}
return 0;
}
E:\nr\fixed>badluk
Full moons on Friday the 13th from 2000 to 2100
10/13/2000
Full moon 4.0 hrs after midnight (EST)
9/13/2019
Full moon 23.6 hrs after midnight (EST)
8/13/2049
Full moon 3.8 hrs after midnight (EST)
2/13/2082
Full moon 1.9 hrs after midnight (EST)
10/13/2084
Full moon 15.2 hrs after midnight (EST)
6/13/2098
Full moon 15.6 hrs after midnight (EST)
> ( I will cheer for about any
>advancement in computer chess :-) ) In the meantime I enjoy matching the
>programs against each other on equal hardware and watching the fireworks.
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