I don't use database of 2500-2700 people because there are database of 3500+ rated machine available now. Actually these books are built with very deep analysis, the rating and accuracy is probably 3700- 3800+. The good point is they are free and currently updating.
Stockfish Opening Book Ctg 16 !FREE!
Download File: https://turbusstelbo.blogspot.com/?file=2vFFws
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