checkmateibeatu: 0-1, 1/2-1/2, and 1-0
What do you think is the border between a blunder, a mistake and an inaccuracy?

I would say a blunder is making a CPOTM thread, and your name is not "proknight98". I would say a mistake is when you are scared of comets hitting the Earth. An inaccuracy would be two shots instead of three. How's that?
An inaccuracy in my opinon is a move that probably should not lose the game for you. An inaccuracy is almost a good move, but you had a better option. After an inaccuracy you still have a lot of fight left.
A mistake in my opinion will take you from a better or even position to an even or worse one. It tends to put you on the defensive. If you were already on the defensive when you made a mistake it will hasten your defeat.
A blunder is a move that you could attribute the entire loss or draw from a win of your game to. If you had made a good move instead of the blunder you would not have gone from win to draw or from win to loss or from draw to loss.

I would say a blunder is making a CPOTM thread, and your name is not "proknight98". I would say a mistake is when you are scared of comets hitting the Earth. An inaccuracy would be two shots instead of three. How's that?
Who did THAT?

I would say a blunder is making a CPOTM thread, and your name is not "proknight98". I would say a mistake is when you are scared of comets hitting the Earth. An inaccuracy would be two shots instead of three. How's that?
Who did THAT?
I don't know! I'm just saying, 'hypothetically'

good question.
GM's losing 0.5 (or maybe even less) of a pawn could be a blunder. beginners losing 1.0 (or maybe even more) of a pawn could be a valid move. so i guess my answer is it depends on the rating of the player.
also, it depends on the current time of the game that the move takes place (i.e. opening, middle, or end). a beginner playing a questionable gambit which drops them 1.0 pawns or more i wouldn't necessarily characterize as a blunder, mistake, or inaccuracy. dropping 1.0 pawns in an endgame, however, could make a huge difference.
as for me personally, i guess i'd say:
inaccuracy = < 1.0 pawns loss
mistake = 1.0-1.9 pawns loss
blunder = > 2.0 pawns loss

Often an inaccuracy is moves being played in the wrong order and the opponent doesn't take advantage so that it transposes into the position that would have resulted had the moves been played in the right order. Had the opponent taken advantage of the move order than the move is a mistake instead of an inaccuracy.

I guess even the technically best games of chess contains at least one inaccuracy, and probably several, but should be free of mistakes and blunders.
Here's one view: http://support.chess.com/Knowledgebase/Article/View/153/13/in-the-computer-analysis-whats-the-difference-between-inaccuracy-mistake-and-blunder

inaccuracy - there was a slightly better move available.
mistake - you made your position even worse.
blunder - you missed an opportunity to get an advantage (moderate+) or you FAILED to defend against a legitimate threat . In either case you go from getting an advantage (moderate +) OR being down the whole game and playing the defensive/trying to get a draw role .
that's my take.

a blunder is a blinder it is a great mistake,mistake is perhaps not making your best move,inaccuracy is when you are not comfortable with your best move as their is plenty of options your opponent can choose.,like winning his best move or forfeiting his best move to secure a draw, inaccuracies are offered in the chessboard. force moves eliminates inaccuracies on the the chessboard.when its a win situation play for a win, when its a drawn position look for the impossible that is possible. when its a losing position, look for playable counter attack that might offer or secure a draw.,in other form of analysis.
Discuss.