I don't know of any endgame position databases. What you could do, is go onto chessgames.com (free) and pick a game by one of your favorite players, or openings, and then skip to the endgame and find positions this way. Especially endgames where one side resigns or there is a draw and you don't know why.
If you do it vs Fritz, be sure to ignore it's numerical evaluation and don't quit until you're sure it's a win/loss/draw. Computer's evaluations are tuned for middle games -- they certainly find some strong moves in the endgame, but their numerical evaluations are ignorable.
This site has a good number of endgame practice positions in it's computer workout section, for paying members. Also chesstempo.com has built in endgame practice positions (also pay for full access).
I would like to start practising endgames against Deep Fritz 12. I have a few questions:
- where should I get positions from ( for about 1400-1600 level ) ?
- are there any databases which I can load so that I don't have to set up each position?
I have tried e-books, but it's hard to split the screen so that I can view the book and a board simultanously.
If you have any tips on endgame study, I'd like to hear them.