I have a beginner opponent I usually play against. When I play with white, usually open with e4, but his answer is always e6, instead of e5. Which advantages can I take from this conservative play?
This is the French defence. It is not more conservative than 1.e5, just a different approach, targetting different things. 2.d4 d5 is normal, then you can decide between 3.Nc3, 3.Nd2 3.e5 or 3.exd5 as the main moves. There are many ways the game can go.