Tactics problems are harmful


That is a good point. Lucky for you I think this bad habit of yours can be fixed quite easily. With a bit of training with defence tactics you will be back on track!
Use tactics trainer here in V3. You can tweak your setting so you only get problems with a particular theme (I am sure you will find out how to do this yourself, it is easy) . In your case you want defence themed tactics.
As a free member you only get a daily allowance of tactics. I think it is like ten. But that is more that enough to fix you problem. Just change the problems you gets' rating to a little above your level and take your time to ponder the position. These problems force you to look at your opponent's tactics and possibilities and force you to look for a defence.
In a few week you may even be a little biased and look for your opponent's moves 90% on the time. If this happens you can just balance the training.
Hope this helps.

I recall reading Cecile Purdy's articles (Australian correspondence champ in the 50's)...where he states that tactical positions don't always exist. An undefended piece for example is a harbinger that a tactical combination may be in the air. So I don't exhaustively look for tactical combinations JUST because pieces are in contact.

You're a much stronger player than I so I won't presume that I know more than you, but "target fixation" is a problem for chess players and fighter pilots. Situational awareness is important in both fields. You've got to assess your opponent's threats, assure yourself that you have a good response and bust up the threat and try to seize the initiative with stronger threats that take less time.

Kempelin: "So many hours spend in solving problems, that I am not trained to see my opponent chances. I have even tried to force myself to look for my opponent tactics on games, but although I can doing for a few moves, my mind ends looking for my own combinations..... I am too trained for that, and need home work to fix."
I thought all, or nearly all chess players, of your strength, have an innate pre-move thought process that goes like this after seeing your opponent's move: "Does his latest move represent a threat (that I need to attend to)?"
I mean, this gets prioritized even before attending to your own threats. I think it's what scholastic coaches teach their young kids in order to get them to stop hanging their pieces. I look at my opponent's tactics before I attend to mine.

In daily games I have the same problem - spending lots of time trying to see a tactic that's not there - in after-game analysis Stockfish may find one, though! In OTB or online rapid games, I try to foresee tactics and if I don't see one quickly enough, I just try to be aggressive because positive tactics combinations tend to flow from that. I just had a game where allowed my a and c pawns to become isolated, otherwise, I'd be wasting time trying to get my pieces mobilized.

I think tactics solving has helped me in many ways but also hurt me in some. For instance I don't seem to play well against solid players that are more positional in nature. The players that leave very few weaknesses, and seek small advantages as a game plan. A guy like me leaves holes for players like that to exploit because I give up positionally important squares to open things up. If things don't open up I lose almost every time. A lot of times in games like that I don't even really know what to do. I seem to thrive when tactical opportunities are present in the position. It's also a lot funner to play that way. Well until I lose, that ain't fun. I need to work on my positional awareness just as much as I work on tactics.