Originally posted by Mad Rook
Here's another. I haven't tried it (only have it bookmarked)..
chessprob: looks bad but is very good.
chesstempo: looks pretty but is not so good.
CTS: 'best by test', hands down.
the only problem people have with CTS is vanity: they don't understand how rating systems work, think they should have a 'higher' rating, start guessing the moves, get disappointed when they can't solve the easy problems correctly, and go look for a place with 'higher' ratings. the excuses range from 'too short time limits' to 'getting harder problems', but the reality is all they're really looking for is a pat in the back in the form of higher ratings.