Chess books should be used as we use glasses: to assist the sight, although some players make use of them as if they thought they conferred sight
Ninety percent of the book variations have no great value, because either they contain mistakes or they are based on fallacious assumptions; just forget about the openings and spend all that time on the endings.
I have not given any drawn or lost games, because I thought them inadequate to the purpose of the book.
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