Author: Christophe Theron
Date: 09:34:29 04/21/98
Go up one level in this thread
On April 20, 1998 at 16:32:43, Thorsten Czub wrote:
>Also:
>
>PSION Chess for ATARI ST was very close to Mephisto AMSTERDAM.
>PSION for IBM was much weaker. Ok, it was a different CPU. But
>it played really ugly. While the main-lines from the ATARI version and
>the Amsterdam were exactly the same (ST was 10 Mhz and therefore a
>little slower)
>the IBM version is strange.
>I never trusted these PC - stuff.
>We should try to relate the
>dedicated version, the IBM = Genius version together.
I have both Genius and Psion (version 1.01, 1985, by Richard Lang, for
IBM PC).
It seems that the selective part of Psion's search is limited to 2
plies, instead of 4 plies for Genius. I suppose it was made
intentionnaly, because they wanted to sell dedicated Mephisto machines,
not PC softwares. Or maybe it's just an older version. This would
explain the fact that the Atari and Mephisto machines behaves the same
way (68000 based computers), because the port of a new version was easy
between the 2, while the PC older version could not be upgraded without
extra work.
Christophe
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