... Most players under 1800 lose through of blunders or missing tactical shots;, ...
"... A remark like 'games are rarely decided in the opening' does not really do justice to the issue. ... even if an initial opening advantage gets spoiled by subsequent mistakes, this doesn't render it meaningless. In the long run, having the advantage out of the opening will bring you better results. Maybe this warning against the study of openings especially focuses on 'merely learning moves'. But almost all opening books and DVD's give ample attention to general plans and developing schemes, typical tactics, whole games, and so on. ..." - IM Willy Hendriks (2012)
... Under 1500 better concentrate on tactics and endgame, you will benefit greatly. ...
"... For beginning players, [Discovering Chess Openings] will offer an opportunity to start out on the right foot and really get a feel for what is happening on the board. ..." - FM Carsten Hansen (2006)