Idea is taken from the battle chess game.
Play normal chess. When piece A takes piece B, the two players play a street fighter (or whatever fighting game) match. The defender can only move or block for the first 30sec of the match. Whoever loses the match loses the piece. King doesn't fight, automatically wins if taking a piece, but you ...
For kids younger than 6, you could try the following:
You start by a specific number of pieces(no pawns or kings) on the board mixed.
One piece is "it" and this piece "chases/attacks" the other pieces.
All the other pieces try to "run away" from this piece.
If "it" captures a piece, the latter piece is "it"
The players switch when a piece ...
Appart from the games you can find under https://bit.ly/PreChessGames (translated web for https://www.ajedrezparalaconvivencia.edu.uy/preajedrez) I may add these:
Chess with cards
You may want to try as well chess with cards. You can download the cards and print them.
Each player has a pile of these cards front face down, and they have to get one card, ...
What do you think is the best time control to play online to improve?
Whichever time control is enough such that you'll be happy to spend at least 15 minutes analyzing the game afterwards. For most of us, that rules out blitz because such games begin to feel "disposable." I find 2+30 or 15+15 to be good enough here.
Have you tried improving mainly via ...
a) can you train your entire repertoire in one swoop? Or are you
forced to choose each opening module and train one at a time?
you have to choose the opening you want to train. However, you have control of what is included in an "opening" The only constraint is that White and Black must be separate. So you could have a single "white" opening and a ...