My grandfather, was a chess-meister, not of huge proportions, but well known in our city. Chess was almost like a diseases (he did not taught my father and his brother in the game, knowing the pain and suffering this would bring later in life)... So one thing he did when he was back home from the local chess club, is to play against himself - replaying old moves, or by the book, or something new, just heard. He would also this with other games - like bridge (or similar). He was truly a genius in his own, and I'm sure he had good time, but he understood really well that it was not good habit long term.

Some people find comfort this way, sometimes it's the only way to get through