Most Frustrating Losses

For me the most frustrating way to lose you could say, is when I lose due to an obvious mistake I made by not having the patience to look at the board long enough and analyzing each possible move. I want to make moves sooner because often I see something that could be what I perceive as a "good" move, or what seems to be the only right move in that situation. When the next move my opponent makes takes a piece I did not notice I become frustrated . If I make a mistake knowing I did not make careless moves I feel better.

When once in a while I try playing 5, 3, or even 1 minute blitz then I am not concerned about such blunders at all. In fact in blitz I really don't think it is the same chess. Maybe it's even pointless. It's fun, but I don't care in quick matches.

when you blunder a backrank mate in a winning position .. damn

blundering your time is as bad as blundering a knight

When I think of frustrating blunders, I think about losing games you were totally winning. Those games in which you win material, but your opponent plays on forever untill you blunder the entire game. Those games and opponents are FRUSTRATING!!!!!