What are the best chess websites for learning through puzzles?

[chessmaster96]

I’ve been trying to improve my chess tactics and I’m looking for good websites that focus mainly on puzzles and tactical training.

I’m interested in hearing what people actually prefer for learning through puzzles, especially for themes like:

* Forks
* Pins
* Skewers
* Discovered attacks
* Double attacks

[Vinvin]

https://chesstempo.com/chess-tactics/ , the best IMO, because it's from before the automatic selection era.
https://lichess.org/training
https://www.chess.com/puzzles

[Look]

I’ve been trying to improve my chess tactics and I’m looking for good websites that focus mainly on puzzles and tactical training.

I’m interested in hearing what people actually prefer for learning through puzzles, especially for themes like:

* Forks
* Pins
* Skewers
* Discovered attacks
* Double attacks

Also feature rich:
https://chesspuzzle.net/