Re: [Scidvspc-users] CQL port to Scid vs PC

[Steve A <ste...@gm...>]

Thanks to Lionel for this. We're working on it, and seems to be going ok :)

It's a very useful feature - only really limited by it's d*mn script
complexity - and will hopefully get a release in ScidvsPC 4.19 before *too*
many months. It should be in subversion in the next week or two.

I might just mention a few things. This is CQL 5.1. It is not really
compatible with CQL 3 , nor (sadly) with Scidb's new implementation.. so
keep this in mind when looking for example scripts. Here is my first/only
script :) , which finds: white pawn forks both black rooks.
    cql ()  shifthorizontal shiftvertical {ra8 rc8 Pb7}
Most of the existing doco is pretty ordinary, so we will be writing some
modest doco of our own.

Like Lionel mentions, it is possible to easily add *lots* of comments to a
database on accident
(eg "cql () r r r" does not find three black rooks, laugh)
but this will not be the *default* behaviour in ScidvsPC when we commit it
to svn. One handy feature this allows, is currently Scid is limited to a
single search match in any one game, but by (optionally) adding comments to
the games, *all* search matches can be found.

It is also quite large - increasing the ScidvsPC binary by something like
25%, and noticeably increasing compile time too.
So i guess we'll have to consider making this a configure-time option. I'm
not sure though.

Anyway - just a heads up about how it is going.

Steven

On Thu, Nov 16, 2017 at 1:10 PM, Lionel <hay...@gm...> wrote:

>
> I've ported Lewis Stiller's and Gady Costeff's CQL v5.1 implementation (
> http://www.gadycosteff.com/cql) to Scid vs PC as a fully integrated
> search engine.
>
> I and a couple of others have been beating up on the engine for 10-12 days
> and it appears to be quite solid. The port was relatively trivial, so I'm
> not expecting many problems, but I'm looking for more volunteers to help
> test what is a rather extensive grammar, especially on non-Linux platforms.
>
> In particular, it would be very helpful if someone possessing Harold van
> der Heijden's study database (http://hhdbv.nl/) could test the port
> against that db. There is a set of scripts in the examples directory to aid
> in that endeavor. I've done my best to find or generate games which test
> the edge cases which are not likely to be present in one's typical chess
> database, but Stiller recommends Heijden's db as something of a testing
> high bar.
>
> The build process for including the CQL engine in the Scid executable has
> only been implemented for the Linux platform, as I have no way of testing
> on other platforms.  I will happily incorporate patches for the Makefiles
> for other platforms as they are offered.  The build requires a C++11
> compiler. The CQL engine has been successfully compiled with GNU g++ and
> with clang, as well as with Microsoft Visual C++.  The entire Scid+CQL
> build has been tested with GNU g++.
>
> I very strongly recommend that users of this feature read the CQL Search
> section in the Help Guide before getting started. There are some essential
> guidelines in that section which can save one from any number of major
> headaches and points of confusion.  Read all of it.  Twice.
>
> Please contact me off list for the [rather large] CQL patch, which applies
> cleanly to the v4.18.1 tarball.  To avoid spamming this list with
> CQL-related noise, please address all questions/problems directly to me.
> Further notices, clarifications, faqs, update patches, etc., coming from me
> will be addressed only to those who have requested the patch.
>
> I'll be welcoming comments and feedback and suggestions while I'm
> eliminating the last of the minor memory leaks in the engine over the next
> few weeks, and hope to release a final patch toward the end of the year.  I
> personally find this integrated CQL engine an order-of-magnitude more
> satisfying to use than the standalone version, and the language, itself,
> continues to impress the hell out of me.
>
>
> Many thanks go to Stiller and Costeff for their innovative work on CQL,
> and to Steve Atkinson for his long years of dedication to the Scid vs PC
> project.
>
>
> -- Lionel
>
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