Here are a couple of sites you might find useful.
I've been trying to rebuild my game after being away from it for many years. In addition to the sites below, Wikipedia includes nice analyses of many openings (search by name) along with links to other chess sources.
Chess Tutorials--A nice list of both free and paid online tutorials, sorted by free/paid.
Error 404 (Not Found)!!1--A list similar to Chessopolis' but not sorted by free/paid.
Another great source is your local public library. There are loads of vintage chess books (and a few recent ones) in most libraries and most of what they cover is still as relevant now as it was many years ago. The obscure branches of openings yield new analysis almost daily, but the main lines have been well established for many decades.
You can also purchase tutorial software--I think Chessmaster has a tutorial mode, though I haven't used it.
Also, play through games you've lost again. When you reach a spot that turned disastrous for you, figure out what you did wrong and what you could have done instead: this is a really good way to stop making the same mistakes. I play through my Gameknot losses at least a couple of times each.
Finally, play, play, play--I have a half dozen or so Gameknot games going at any one time, and I've slowly improved my rating to just above 1500. I also play against a tablet chess computer that at its highest setting routinely kicks my butt: computer opponents are a great way to learn to stop making careless errors--they never fail to punish obvious errors, and they let you take them back and move on.
I'm also Omnivorous on gameknot, and if you want to challenge me to an unrated game, I'd be happy to include commentary along the way. I'm no master, but I know basic openings and tactics fairly well.
I'll tell you how I think you went wrong when you do, and I'll make pretty good excuses when I do.
Real things always push back.-William James
Save lives! Click here!Join the World Community Grid with Team EvC!---------------------------------------