lawlevin - let me just say, I feel your pain.
I play on Chessmaster myself, although not as much as Fritz, but I do find myself getting a little stressed out. Trying to deal with a sub-par position being down material can make anyone's game dark. But forcing the action is not that good either, like you said, it leads to a quick loss. If you find that you are holding your own against personalities rated 1600, then weakening or blundering because of the mental taxation, isn't it possible to pause a rated game? I know it's the not the fairest thing to do and I don't know if it upsets the engine's thinking lines, but if you have to, do that. If you have a chessboard handy, set up the current position on the board and look at it that way, you might see something you don't see in the game. Also, what set do you use in the game? I was a 3D player for years but I got used to the 2D interface here and I see the board a lot clearer overhead.
If you feel "brain drain" from chess, take a break from it for a little while. I do, especially if I play 5 or 6 games in a day, it would weaken anyone. I hope something in this post helps
-Mark
Let me preface this by mentioning that I am pretty much a closet chess player meaning that I play exclusively on the PC against ChessMaster in the training area. I play that way working my way up against higher rated players in the program.
Lately I have been playing against personalities rated somewhere around the mid 1600 level. These games tend to be pretty even for around 40 to 50 moves and I find that my mind has been taxed pretty hard to get to this point.
The games up to this point tend to be what would be considered defensive in nature with some minor pokes and prods to find some kind of an opening for attack without much success.
So here it is... at this point I suppose I have had enough and I seem to more or less give up on thinking through moves like I should and just force the action which invariably seems to result in a rather quick loss from there.
My question is how do you handle a game when you just seem to have had enough yet you still want to play it through to a win?