Author: Christophe Theron
Date: 11:52:36 11/19/99
Go up one level in this thread
On November 19, 1999 at 10:00:22, Ratko V Tomic wrote:
>> * Tiger's book learning is almost nonexistent. Tiger just avoid
>> repeating lost games.
>
>How far back in the lost game does it start the avoiding? With Fritz 5.32, after
>it lost few games in an opening (for reasons well beyond and unrelated to the
>opening), it stopped playing a perfectly good entire opening completely. I had
>to reinstall the book from the CD (since it wouldn't reset the weights properly
>on the copy it had on the hard disk). And after that would give only a short
>lived variety in openings (no matter what its book menu options said, it seems
>to learn its own way, anyway) I had to reinstall it and make the book read-only
>file to get rid of its excess in cleverness. Similar problem occured with its
>forcing winning lines, where it started playing the same opening line
>repeatedly, even though its wins again had nothing to do with the opening but
>came much later (mostly for resons of tactical oversights).
>
>So Fritz (or Hiarcs) learning is basically rigged to squeeze an extra point or
>two in mindless comp-comp marathons against the less aggressive learners, at the
>great inconvenience of its end user (but the extra few points from the
>mechanical comp-comp matches give it a greater attractivenes to the potential
>new customer, i.e. CB's customer philosophy appears indistinguishable from that
>of a used car salesman).
>
(snip)
I totally understand your concerns about book learning and user annoyance.
That's exactly what has guided my choice toward the system Tiger currently uses.
Tiger will never totally reject some kind of openings just because he has lost a
game once by using it.
I know some programs that will not play 1.d4 again if they lose a game by
playing this!
That's not the case with Tiger. It's even possible that Tiger plays all the
moves in a line he has lost already, provided enough time has elapsed since the
last time he has lost this line.
I think it's possible to see this behaviour and the fact that this book learning
is rather "soft" and user friendly in the SSDF games.
Christophe
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