Hello,

For me, websites like this one help me train, practice and learn for OTB tournament.  Live chess is fine, but in reality most players only play blitz in live chess.  And there's a limit to what you can learn in blitz game.  Online chess enable me to think many positions, and practice all phases of the game at the same time.  I can do up to 100 games at the same time (note that it all depends on the time control, and number of players in vacation).  I even went up to 150 but that is an extreme limit.

Online chess practices thinking far more than live chess.  A key to improve and limit blunder is basically to force yourself to slow down and think before moving.  The note is not that useful, in my opinion.  You still have to put yourself back in a game.  Most blunders come from playing too fast.  You don't have to make a move in 10 seconds.  Don't be afraid to think on average 2 minutes for a move, just like OTB tournament. 

However, I don't agree with overanalyzing a position.  You gain more by being exposed to many games and many positions than overanalyzing ONE position.

The key is to view these as learning activities and not worry too much about winning and rating. In my experience, if you keep playing correspondance game, you'll see these blunders become less and less frequent and your play improve, even in OTB or live chess.

i hear ya. I started with 5 games and next thing i know there are over 20 games im involved in. I like to think of the matches like little puzzles. Notes help for the closed games. Sometimes after stepping away for some hours ive noticed moves that in the fog of overthinking become unclear. Nothing beats live chess tho.