feature requests: Support from different opening books

[Heikoschach]

for book tests it would be desirable that the GUI supports different opening book formats.
e.g. *.ctg; *.bin; *.abk; *.bkt

in a tournament it should be possible to connect one engine with several opening books or several engines each with its own opening book.

Best Regards
Heiko

[pham]

Thanks for the suggestion. BSG has supported some book formats:
- PGN. Mainly for tournaments
- EPD. Mainly for tournaments
- Polyglot (.bin)
- OOBS (Open Opening Book Standard, .obs.db3)

BSG also supports some online books (from Lichess and chessdb).

We won't support other books such as CTG, ABK, BKT... since their formats may be closed sources, lack information, restricted licenses, or have some strong drawbacks.

Using individual books for engines is quite complicated for users to use/set up. Thus we note it as a future task.