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Subject: Re: Will Someone with Two Computers post some Rebxp results vs fritz?nt

Author: Ed Schröder

Date: 16:46:20 07/21/02

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On July 21, 2002 at 18:47:34, martin fierz wrote:

>i think thorsten czub posted a couple of games here between rebel XP and fritz,
>with XP coming out as a clear winner. but they were just a few games...

>ed, you sure have a great chess engine. why do you have to make such strange
>statements on your webpage like:
>
>
>"Rebel is famous for its playing strength and is feared among the world top
>chess players, Rebel for example never lost a serious match against the top
>chess players of the world. Rebel until now played 4 chess matches against Super
>GM Arthur Yusupov (1997), Super GM Vishy Anand (1998), GM John van der Wiel
>(2001) and recently against top player Loek van Wely (2002) and only Super GM
>Loek van Wely was able to hold Rebel on a 2-2 score, Rebel won the other 3
>matches. No other chess program in the world has achieved that result! "
>
>it is beyond me how you can compute an overall match result in the matches where
>you mixed blitz, rapid and classical chess (i mean, i understand what you do,
>but i don't understand why... except of course for marketing reasons). "only
>super GM van wely was able to hold rebel to a 2-2 score" because he had the
>longest time controls. probably any other chess program in the world would beat
>yusupov and anand in blitz matches.

Two remarks:

1) the match against Yusupov was in 1997, it was played on a poor Pentium-266.
At that time (1997) it was totally unclear if a chess program could win against
a top GM, note that Yusupov was the world 10th player in that time.

Furthermore the GM and me they negotiate a scenario where both camps think they
have a chance to win the match and so it happens, thus the one with the most
points wins the match. That's crystal clear from the beginning. Nobody starts to
play such a match against a computer if he thinks he will lose.

Anand (1998), same procedure. Note that 2 tournament games where part of the
match, also Anand at that time was considered the best blitz player of the
world, maybe he still is.

2) Of course a home page is meant for promoting your stuff. If you want to sell
something you present the stuff you sell in a honest and attractive way. Ever
heard a general saying to his soldiers, "hi guys, sorry to bother you but
whenever you have the time give me a little bit fire" when the enemy is coming?
No, a good general says: FIRE!



>"The chess engine has gained +33 elo above its precursor Rebel Century 4 which
>is considered as a great improvement when you realize Rebel Century 4 was
>already rated above 2700 because of its performance against Super GM Loek van
>Wely. Therefore Rebel XP is estimated to play in the area of 2730-2750 elo being
>a Super GM itself."
>
>33 elo? or 32? again, a statement which comes from nowhere! how did you measure
>the improvement in playing strength with such accuracy? given the controversy
>over computer ratings i'm sure everybody here would like to know...
>rebel century 4 is NOT rated above 2700 because of it's performance against van
>Wely. from a 4-game match you cannot deduce a valid elo rating.
>
>why don't you just stick to the chess part and only show the positions where
>rebel has improved? that's really impressive. marketing hype like the above is
>not.

The elo 33 gain was measured from a 400 games at 30 secs\move against Rebel
Century4.

Ed


>aloha
>  martin



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