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Subject: Re: DPM "Double Ponder Move" problems with InBetween or CB Adapter ...

Author: Odd Gunnar Malin

Date: 17:27:45 06/14/01

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On June 14, 2001 at 17:26:20, Dieter Buerssner wrote:

>I think, this is normal behaviour for any WB-engines under CB, that do not
>support the CB specific ponder mode. No engine, that is not specifically adapted
>to the WB-adapter :-) will support pondering very well under CB. The WB adapter
>starts a "normal" search, with some time control. And with a normal search, the
>engine will reply after some time, and not wait for the opponent to move.

The result is that strong engine would be weaker and engines thats not have
ponder implemented would be stronger :)

There is some worse problem with the latest adapter as FQ points out.
If he leaves the engine in ponder mode it will continue to ponder on this new
position. And if you do the move from the first ponder (The move from the GUI).
The GUI will do the move from the last pondering (that from the engine it self)
if its allowed to ponder to the same ply as the first ponder.
Ex.

1.a3 e5
(
GUI moves 2.e3
Engine moves 2...d5 with PV d5 d4 Nc6 Bb5
Engine ponder on 3.d4  with PV Nc6 Bb5 a6 Bxc6
)
2.e3
And what now?
The GUI plays 2...Nc6  instantly and not 2...d5
2...Nc6??? Could be a big blunder!

Odd Gunnar Malin




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