Hello Jeff,

thank you for giving me the opportunity to elaborate on this.

Ingo:
> >> Exhibition games from the years 2004-2007, during the Mainz chess
> >> festivals, indicated that human grandmasters seemed to do easier
> >> against bots in Chess960 compared with normal chess.

Jeff:
> I wouldn't take it seriously without further data. Going by the 
> Wikipedia page: http://en.wikipedia.org/wiki/Chess960
> 
> 2004: "At the same tournament in 2004, Aronian played two Chess960
> games against the Dutch computer chess program The Baron, developed 
> by Richard Pijl. Both games ended in a draw. 

Right. Observe that these games (all in Mainz) were played at quick
times: Each side had 25 minutes in total for all moves.
Fast play favours bots in chess. 
I was referee in the Mainz tournaments in 2005 and 2006.

> It was the first ever man against machine match in Chess960. 

Yes. But already in 1997 I had played an 8 games match (with slow times;
3 minutes per move in the average) against Germany's no.1 GM, Artur
Yusupov, in shuffle chess without Fischer castling.
In 5 of the 8 games Yusupov had an advantage after the opening,
and in two others the position was balanced. Yusupov had a score of
+1, =4, -3 against my "List-3-Hirn". Two of his 3 losses were in the
last two rounds, when he was tired (we played 8 days, one game per
day).

You can find details in my book "13 Jahre 3-Hirn" (in German; title to
English: 13 years of 3-Hirn"). 
http://www.3-hirn-verlag.de/books.html
From the Yusupov match I have appended a short episode on a pre-test,
wehre we only played 12 moves - and Yusupov had a clearly won position
after that.

> Zoltán Almási won the Chess960 open tournament in 2004."

In "normal" chess his r ating was around 2600 (at tournament time levels).
 
> Problem: "The Baron" wasn't a top chess program. An archive page of the 
> computer chess rating list from 2006, the earliest I could find, shows 
> it at around 2500, 

> whereas top program, Rybka, from the same list is around 3000. 

Rybka (now declared to have been a semi-clone of Fruit, by the way)
entered the scene only in December 2005. The Mainz tournament was in July
2005.


> 2005: "In 2005, The Baron played two Chess960 games against Chess960 
> World Champion Peter Svidler; Svidler won 1.5–0.5. The chess program 
> Shredder, developed by Stefan Meyer-Kahlen from Düsseldorf, Germany, 
> played two games against Zoltán Almási from Hungary; Shredder won
> 2–0."
> Again, "The Baron" lost, but Shredder (rated around 2850 from the same 
> list) won both its games.

Unfortunately I do not have the Almasi games at hand. But I remember well
that Almasi had a very positive position in the first game, before he
blundered in time trouble. In the second game he was "denerved".
 

> 2006-2007: Games between computers and grandmasters aren't listed. I'm 
> suspicious that this isn't a coincidence once the top programs got into 
> the field.

It had to do with the overall schedule of the Mainz festival.
Mainz was an event with almost 1,000 humans playing, and the
organizers had other priorities.

> If you've got other evidence, Ingo, please share. 
> Given that humans rely so much on experience, and computers are so 
> good at tactics, it would be surprising if Chess960 was more difficult
> for computers. 

Chess computers have big opening books. Without them they sometimes
play really very strange moves in the very first positions - being unable
to repair the damage later.

> I'd also think 
> computers would have a big advantage in creating an opening database
> for all 960 positions if the programmers so chose to create one.

Programmers had not done that in 2004-2006. (I know from my job and
my discussions during those tournaments.)

In the appendix you also find two photos from Mainz:
one showing (from left) GM Svidler - Ingo Althofer - programmer
the second one showing organizer Mark Vogelgesang and programmer
Richard Pijl.

Ingo.
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