ooooohh ok ok i think this is silly... making blunders is so easy, they are all aroung the board!
how to get 400 rapid???

(PS I am not making fun of 400 ELO people, this person is 1800. I’m helping them reach 400.)

Learn and apply the most important principles of chess. - (core of my teaching)
Always blunder-check your moves.
Solve tactics in the right way.
Analyze your games.
Study games of strong players.
Learn how to be more psychologically resilient.
Work on your time management skills.
Get a coach if you can.
😏😏😏