How should one improve at chess ?
1) Always check your intended move is no blunder before you play it.
2) Train tactics puzzles until your tactics puzzle rating exceeds your desired play rating.
3) Play rapid or classical preferably with increment. 15|10 is fine.
4) Use all the time allowed by the time control.
5) Analyse your lost games.
6) Study annotated grandmaster games.
7) Study rook endgames.
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