When book is strong game in all periods in middle game and in endgame is good.
I know this as 2 x2 = 4
When book is weak game also weak. All lines about openings are in Fritz pewrbook. Wy need other book? vasely or antimaster?
All openings there. But why engine under this book is very weak? why?
Becouse in middle game if book is strong , there are exellent moves there, And engine works under book by exellent moves. That;s why when now new books lunch authors add in their updates new played games from engine rooms.
Start in each opening are same in books. Sicilian , ok sicilian has many variants and these have all books. But strong book which? which has own repertoire of openings,
strong book do not need all openings theory. If book need for study then ok take pwerbook 2011, but if for fighting against engines then poewrbokk does not need