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Manual adjustment of the basic lines does not occupy a lot of time. Put green colour to the basic courses. About training from base of games.

8/1P2R3/6pk/1B1p3p/4p2P/1P2K3/r5Pb/8 b - - 0 44
In this position Mybook18.3 have 2 moves:
44.... Rg2 (green colour, a tournament course), 1/2-1/2
44.... Bg1 + (red colour, not tournament course), 1-0
Mybook18.3 play 44... Bg1 +??? (44... Rg2!, draw). Plays Rybka3. The course is made not under the book. Because superfluous training by base of games has affected the book. Because of it (superfluous training by base of games) I have lost many points in Sedatchess and Pionerchess. I recommend to dump weight in the book.