Sometimes there is no excuse for blundering. Whether you call it a distraction, a concentration problem, or any other excuse, a blunder is simply... failure to perform.
And, one expression I can think of that describes such a scenario is: One man`s pain is another man`s gain...
So what is my excuse? The following game is one that tested my patience. I say that because players often make their moves at a completely different pace. And, somehow I gave up a lead and blundered in the worst possible way.
The adjustment I made following this game was: Going back to the basics, taking the time necessary not to rush any moves before properly executing the first move.