Newsgroup: it.hobby.scacchi
Titolo: forza gnuchess

Qualcuno mi può indicare la forza approssimativa di Gnuchess ( in ELO
), in dotazione a Winboard ?
Vi ringrazio
Andrea

 ha scritto nel messaggio
news:27ad8fa2.02081...@posting.google.com...

qui c'e' quello che vuoi sapere ( fonte: FAQ del sito ufficiale GNUchess ):
[B.2] What is GNU Chess's rating?
It would be irresponsible to answer this question with a number, without
first explaining a few things about ratings.
The ratings that are commonly given for computer chess players are less
meaningful than they may seem. Most computer chess players (including GNU
Chess) do not play in tournaments against humans, or do so only rarely, so
they do not have official ratings from FIDE, USCF, or other chess
organizations.
Some people have methods for rating chess programs approximately by giving
them a set of problems to work on and seeing how they do, or by having them
play tournaments against each other. Any rating number produced by such
means should be taken with a grain of salt; it may be only a rough
approximation to the rating the program would achieve in over-the-board
tournament competition against humans. The chess skills required for solving
problems or playing against other computers are not necessarily the same as
those required for play against humans. Also, of course, tournaments among
computers can rate the computers only relative to one another, not relative
to humans. Some of the computers need to be rated by other means to give the
ratings a basis to start from.
Compared with human players, computer players are strong tactically but weak
strategically, and are much better at blitz chess than at slow chess. These
differences make it more difficult to assign a meaningful rating too.
Several computers do play regularly on the Internet chess servers and have
achieved ratings there. These ratings have the advantage of being based on
many games. On the other hand, ICS ratings are only roughly comparable to
USCF or FIDE ratings. Many players have ICS ratings that are hundreds of
points higher or lower than their USCF or FIDE ratings.
Finally, unlike dedicated chess machines, or PC chess programs that run on
only a few different models of Intel processors, GNU Chess runs on many
different kinds of CPU at many different speeds. Thus its strength depends
on how fast a machine you run it on and how much optimization your C
compiler does. Some people have formulas for estimating how a computer
player's rating varies on faster or slower machines---see the
rec.games.chess FAQ for more information---but these need to be taken with a
grain of salt too.
All that said, here are some numbers.
- On the Free Internet Chess Server (
freechess.org
), GNU Chess 5.04 running
on a Cyrix 166Mhz processor (Pentium 200MHz equivalent), with default
settings attained a blitz rating of above 2100.

 first explaining a few things about ratings....
Grazie, Roberto.
In effetti finora ho giocato solo lampo...e non me ne ha fatta passare
una ! Sono riuscito a strappargli solo una faticosa patta.
Va detto che non sono un gran giocatore, ma nemmeno una schiappa
completa.
Comunque per sviluppare l'occhio per la tattica è ottimo, devi
aspettarti sempre il peggio...senza contare l'impossibiltà che caschi
in trappole che non siano del livello di Alekhine, o frutto di
sequenze forzate.
Ciao
Andrea