For everyone who hasn’t bought premium and loves the puzzles, this is a great way to get the training you need. First, log out of your account. After that, you can go to the “Puzzles” menu and select the normal activity(online puzzle games not available when logged out). Afterwards, since you’re not logged in, you’ll have no account at the ready to upgrade to premium, and you’ll be able to play as many puzzles as you want.(WARNING: Due to you being logged out, your puzzle rating will not be affected in any way whatsoever)