Endgame is perhaps the main area where you can, definitively, prove that you've learnt something.
When you work out how to win or draw a position, you can test yourself against the computer to see if you've memorised the technique, or apply the principles if it plays slightly different moves than you were taught. You can also use endgame databases to check that you're moves are winning, or to see the winning lines if you're not sure.
Get an endgame book. I like Silmans Complete Endgame Course.
I have just two question! I think I'm weak in some endgames. My questions are:
- Where to study it? I don't have any book or something similar, so I'm asking if there is any site (like chesstempo), where you can study it...or any free book?
- How to study it? If you have a book, how can you prove at the end of the day, that you have learned something? :)
Thanks for all the answers! :)