I could not help but post something about the following problem which I encounter continuously whilst playing in a long chess game (e.g. 1 hour 30 minutes each or longer.)
The reason I mention this is because I find it difficult to stay at the board for the whole time control, whether winning or losing or if the position is drawish. And I basically believe this is in turn the reason for me losing a lot of won positions or games. I guess a way of rectifying this would be to make sure I win them.
If anyone has any useful tips for me or anyone in general on how to improve concentration during a long game, I find this happens regularly and I find it affects my general play against whoever my opposition is.
Regards Matt.