What is the best opening for players below 1300 ELO?

Wow, this had been insightful so far. Thanks! @mkubecek said in #2:

"On this level, I would suggest not to waste too much time with opening lines and rather focus on understanding and applying basic opening principles, improving your tactical vision (mostly pattern recognition and tactical awareness)." I generally agree. This is why I recommend playing the London or Colle systems because of their simplicity and low levels of neede memorization.

@mkubecek said in #2:

On this level, I would suggest not to waste too much time with opening lines and rather focus on understanding and applying basic opening principles, improving your tactical vision (mostly pattern recognition and tactical awareness).
.
agree.-- to pick something, For white Colle after d4 d5 or 4knights after e4 e5. Both stick to basic developmet principles

I have the most fun playing the KID of all the openings that I know.

@morphyms1817 said in #13:

I have the most fun playing the KID of all the openings that I know.
The cool thing about it is that you don't have to learn any theory, you can simply enable "Kid mode" in the settings

@The_Merry_Chesster said in #14:

The cool thing about it is that you don't have to learn any theory, you can simply enable "Kid mode" in the settings

Okayyyy, for the unitiated, I'm speaking of King's Indian Defense. Begins after white plays 1d4, frequently with black responding Nf6, g3, Bg7.

Black's 4th move is sometimes d6, followed by planning a King side attack after all pieces are developed.

@morphyms1817 said in #15:

Okayyyy, for the unitiated, I'm speaking of King's Indian Defense. Begins after 1d4, frequently with black moves Nf6, g3, Bg7.
I know, was only KIDding ;)

Openings don't matter at 1300, who blunders first do. Play aggressive gambits to attack early since most players at this level can't defend well.

@BabyPoltergeist said in #18:

Openings don't matter at 1300, who blunders first do. Play aggressive gambits

does not really make sense

Openings do matter, just not as much and in a different way as they do for stronger players

There is no best opening, unless you define what you want to optimize

@BabyPoltergeist said in #18:

Openings don't matter at 1300, who blunders first do. Play aggressive gambits to attack early since most players at this level can't defend well.

Openings make chess more fun for some including players < 1300.