Features I would like to see on a chess site (chess.com, lichess, etc.)

1. Tactics puzzles from your own games

It would be so nice if you could click a button and instantly have a collection of tactics puzzles from your games.

2. Tactics puzzles from specific openings

These could be taken from your games and the games of other site users.

3. Opening repertoire suggestions based around common pawn structures and middle game plans

e.g. play the stonewall Dutch as white and black

4. articulate plans for a position in human language

5. a 'why you lost or won' summary statement after each game

6. a training feature where you guess the engine evaluation of a position

7. strategy puzzles

8. training feature where you have to articulate the plans for a position

9. way to connect with training partners through the platform

10. lessons on middle game patterns