chess960 would be a great addition, and well, I'm really a beginner when 
it comes to software/programming and such (not to chess though), but if 
you need someone to do some testing I might be of some help. I might 
need a bit of guidance of how to report errors and basic stuff like 
that. Apparently Chess960 is really hard to implement, so good luck in 
your effort!

Ashwin



On 2015年09月27日 10:26, Steve A wrote:
> You're welcome to have a go Patrik.
>
> I have updated the chess960 patch in the "patches" directory
> with a few tweaks, including trying to set UCI_Chess960 properly.
>
> But getting this going is very tough. Like Gregor said - because
> Scid's main functionality is as a database, it is much more
> complicated than just getting the engines to work.
>
> Steve
>
> On Sat, Sep 26, 2015 at 2:31 AM, mrx <patrik....@gmail.com> wrote:
>> Hi,
>>
>> I would be interested in giving it a try. Though the knowledge level of the
>> code base you hint is required to do this is far above mine.
>>
>> Thanks for your prompt answer!
>>
>> // Patrik
>>
>> Den 25 sep 2015 17:58 skrev "Gregor Cramer" <rema...@gmx.net>:
>>> Hi Patrik,
>>>
>>>> What is the internal move generator used for?
>>> 1. Validation of the move on the board. The current validation does not
>>> allow
>>> to play Chess960 castlings (except if king is on e, and the rooks are on
>>> a,h).
>>>
>>> 2. Computation of move suggestions, this feature facilitates move input on
>>> the
>>> GUI board.
>>>
>>>> Is it just the castling rules that are missing from the internal move
>>>> generator?
>>> Yes, but this requires more changes, for example how a castling move will
>>> be
>>> stored inside the move structure, the current handling is not appropriate
>>> for
>>> Chess960. Furthermore the code of the board stuff has to be prepared for
>>> these
>>> castling rules.
>>>
>>>> What is the opening tree used for when i play against an engine?
>>> It depends on your decision if you want to use the opening tree or not.
>>> But
>>> implementing the Chess960 castling rules without preparing also the
>>> position
>>> search (for the opening tree) for Chess960 would be half-baked.
>>>
>>>> Concerning the castling rules, wouldn't the engine you play against tell
>>>> you if you try to make an invalid move? I cannot see why Scid vs. PC
>>>> would
>>>> have to implement the castling rules at all, if Scid vs. PC could handle
>>>> that response.
>>> Some engines are responding with an error message in case of an invalid
>>> move,
>>> some are silently ignoring such a move, and some are crashing. The
>>> behavior
>>> depends on the diligence of the developer.
>>>
>>> Scid cannot handle the response if the move is a real Chess960 castling,
>>> this
>>> move cannot be played on the board without support. Any response of the
>>> engine
>>> will be validated - without validation it would be possible to store
>>> corrupted
>>> games in the database if the engine is responding with an invalid move
>>> (the
>>> binary decoding of the moves in the database depends on the standard chess
>>> rules, an invalid move is corrupting the database) - and without support
>>> the
>>> validation of Chess960 castling fails.
>>>
>>>> Perhaps it would be a good start to just support Chess960 against an
>>>> engine
>>>> to begin with.
>>> This is not possible, the engine support requires that the move generator
>>> (and
>>> this implies also the internal board) is already prepared for Chess960.
>>> The
>>> effort for Chess960 support is high, and requires deep knowledge of the
>>> code
>>> base. The only easement is that the binary encoding of the moves in the
>>> database must not be changed, the current encoding for castling moves even
>>> works for Chess960. But a new database version number - this means .si5 -
>>> is
>>> unavoidable (if you store Chess960 games in .si4, then an older Scid
>>> version
>>> will have problems with such a database). Probably sometimes someone will
>>> do
>>> the implementation for Chess960!?
>>>
>>> Cheers,
>>> Gregor
>>
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