Knowledge Base is the work of months carefully building a quality Polyglot database with analyzed positions by top engines, mainly by Stockfish 12 and Stockfish 13. The average quality of of the current 60 million analyzed positions is around ~3300 elo. The database contains a wealth of information for opening study and for correspondence players. Knowledge Base is made available for SCID for easy browsing through the Polyglot database by clicking on the moves.
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The development of Knowledge Base is about half way and updates will be frequently available from the Annotator page. You can either wait for an update of knowledge.bin (here on this page) or update knowledge.bin yourself with the Merge-Books utility.
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http://rebel13.nl/home/scid-with-knowledge-base.html
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