I'm wondering if other older folks here have a similar experience to my own. I'm 67, retired, and have plenty of time for improving chess. Time, yes, but here I am before 4 am, not sleeping. I often feel tired. With fatigue comes lack of focus. I often feel not up to playing well. Yet I don't seem to be completely physically deteriorating. I can do fifty pushups in one set. Anyway, here I am, in the wee hours, wondering if anyone else is in a similar situation.