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Subject: Re: A question about unwanted transpositions in the opening book

Author: Alessandro Scotti

Date: 14:03:36 10/08/04

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On October 08, 2004 at 13:13:15, Peter Schäfer wrote:

>On October 07, 2004 at 18:07:25, Alessandro Scotti wrote:
>
>>I was testing an idea from Dan Honeycutt and played: 1. e3 e5 2. e4 Nf6 3. Nf3
>>and Kiwi played 3... Ng8?? from the book! Argh!
>
>The position in the book is
> "wNf3,wPe4,bPe5 - black to move",
>but the resulting position after Ng8 is
> "wNf3,wPe4,bPe5 - white to move"
>
>So, if you encode the moving side into your hash keys,
>you shouldn't run into this problem (or am I missing something ?).

Yes that was one of the solutions I considered, but as Dieter said there could
be more subtle cases where even this "protection" would be not enough to handle
the transposition correctly... more work to do on the book format I guess... :-(



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