How to stop blundering

1. From what I understand, the difference between a blunder and a mistake is by how many points the position  changes. If you render yourself vulnerable to a  pawn fork, hang a piece, or make yourself open to mate, all of these can be considered a blunder because they change the positional evaluation in favor of your opponent by a particular number. A mistake has a lower position eval change than a blunder- this is based on hanging a pawn or losing an exchange that isn’t big enough to be a blunder but still gives you a disadvantage. It can also be a positional mistake (doubled pawns, reduced efficiency of a piece, loss of tempo, etc.) 

2. The bars refer to the time each player took to make a move. 

Don't get tunnel vision, look at where any piece can go and evaluate the entire position

1. There's no clearly defined difference between a blunder and a mistake. In fact all blunders are mistakes, but not all mistakes are called blunders. Normally by blunder people mean a very serious, game losing mistake, often an obvious one. E.g. hanging a piece or a mate.

2. The little bars indicate how much time was spent on making the move.

I'm the same. Rated about 500. No one ever taught me how to play chess but I can get good checks but tend to blunder early in the game. The best thing I've found for me is to just spend more time on each move and double-triple check thats the move you want to make.

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Only way to stop all blunders is to quit playing chess.

Thank you

For what it's worth, I have set up a small and free chess app exactly for the purpose of avoiding blunders by learning from your own past mistakes:

You import your own chess games, and the app will screen your moves and generate puzzles from the blunders and mistakes that you have made in these games.

Then, you can replay the positions and find better moves. The app will support you by assessing your moves and recommending best moves based on chess engine evaluations. Like this, you will learn from your past blunders and improve your chess skills!

You can find it in the Play Store: https://play.google.com/store/apps/details?id=com.cbt.chess_blunder_trainer

Let me know, what you think!

You can find more info here as well: www.chessblundertrainer.com

Mistakes often come from haste and poor calculation. Double-check your analysis before making a move. Develop pattern recognition skills by studying games and tactical puzzles. Stay focused throughout the game, as a lack of concentration can be costly. Analyze your mistakes after the game and learn from them.

Yes I do blunders in most stupid ways please help

I've reduced the number of my blunders over the past year or so, but eliminating them altogether is harder. I play longer games - typically 30 minutes Rapid - and I think this cuts down on the blunders that are caused by being in a rush - the typical "Blitz" blunder. On the other hand after playing for a while your attention can flag and a blunder can happen then. This is quite possible in a close-fought game where you're going toe-to-toe with an opponent. Of course the opponent may blunder too.

In my latest game, on move 38, I hung a Bishop. Shortly after making the move, I thought, "I hope he doesn't see that." Unfortunately he did. Oddly enough the Game Review only called it an "Inaccuracy". My overall game accuracy in the Review was 79% to the opponent's 82% and the individual game rating for me was 1400, quite a bit above my actual level (985). The opponent was on 1600. I sometimes treat it as a consolation prize if my accuracy and/or game rating is high even if the game is lost.

Not really. A blunder is any move that loses if you're drawing or winning, or draws when you're winning.

play 20 min+ often