Pascal Georges,  czwartek, 26 czerwca 2008:

>The penalty is at least 15 bytes + tag (uid) = 18 bytes. I checked the
>"enormous" base on Crafty's site, and each game is 82 bytes on average. So
>we increase games' data by 18% ! The figure is high, and should be around 8%
>with games where the header part has more info (like Chessbase for example),
>where the average size of games is about 200 bytes.

>No, because the idea is to use a flag (that already exists) and add
>information only to the relevant games. For example, consider the tactics
>flag : only few games would need this flag along with the extra PGN tags.
>Consider the main references :
>- CT Art : 1200 games
>- Polgar's endgames, middlegame and endings books : around 5000 games each.
>
>If we achieve to correctly set flags and PGN tags in a big ref DB with as
>many games as above, this would mean about 5000*50 bytes = 250 kB of extra
>info in sg3 file, with nearly no penalty on searches (because of the flag).

>And to have games annotated / flagged would give a very good "added value"
>to Scid's users. In fact I would love to get performance decreases because I
>have a DB with a lot of info and training exercises !
What about using just a flag to mark that category/subcategory is available 
for the game?

(In fact, I still don't believe flags are useful here, I doubt we will ever 
have training database with >10K games.


-- 
Michal Rudolf

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