Originally posted by Ason Pigg2
i'd say opening is important , at least know these 4
The Nimzo Indian and Queens Gambit are both avoidable. Try the Benoni for example.
The Ruy Lopez and Sicilian are both complex and exhaustively analysed. You cannot know all of them. I have been playing Kings Gambit so only
need to focus on RL as black. Try and adopt more forcing lines so you don't need too much theory (they may not be the best lines for GMs but they are for you, because less theory is involved). I have therefore been focusing on and playing the RL Open as black and the Morra Gambit (against the Sicilian) as white. In both these openings my knowledge is usually better than my opponents as it is in the Kings Gambit and Benoni.
These 4 openings cover the overwhelming majority of games played against me but as white you also need to explore lines against the Caro Cann and French. As black you will face the GP and Scotch most often after the RL but these 4 openings will only comprise 20% of your games so work on the others first. As a novice try and avoid the RL as white. Maybe your style doesn't include the KG in which case try the Scotch.