being drunk and playing chess..

I've played tournaments drunk and sober and there is about 350 to 400 points difference in results. I've went back and calculated the performance ratings of games/tournaments I knew I was drinking during and games/tournaments I was completely sober during.

Conclusion: No more getting drunk & playing serious games.

What's the reasoning behind it

Mom does not follow that rule herself, why should I? 

I wonder, besides me, what kind of people is reading this kind of forum. Cheers. 7 lost by now.

Chess is alcohol.

Joseph Henry Blackburne on Addiction and Chess

Edward Winter's exceptional Chess Notes column on 7 January, "Chess and Alcohol," carried an image of an 1895 republication of an interview with Joseph Henry Blackburne. The article was published first in the Daily Chronicle and then in Chess Player's Chronicle; Winter reproduces it.

The reporter asked Blackburne whether chess is "the intellectual pastime that some people declare," whether it has a place in schools, and whether perhaps it might even serve as a substitute for geometry. Although the question seems a bit over the top, Blackburne's answer serves a cautionary footnote to the efforts of many (including me) who push chess into the school curriculum. The reporter might have asked whether it could supplement or precede the study of Euclid (original works in geometry), rather than replace such study. Would Blackburne's answer have differed? We cannot know. But the truth of his remarks ring true in any case, at least they do when we consider the widespread ailment known as an online blitz addiction.

Blackburne said, in part:

Decidedly not. I know a lot of people who hold the view that Chess is an excellent means of training the mind in logic and shrewd calculation, prevision, and caution. But I don't find these qualities reflected in the lives of Chess Players. They are just as fallible, and as foolish if you like, as other folk who don't know a Rook from a Pawn. But even if it were a form of mental discipline—which I take leave to doubt—I should still object to it on the ground of its fatal fascination. Chess is a kind of mental alcohol. It inebriates the man who plays it constantly. He lives in a chess atmosphere, and his dreams are of gambits and end games. I have known many an able man ruined by Chess. The game has charmed him, and as a consequence he has given up everything to the charmer. No; unless a man has supreme self-control it is better that he should not learn to play Chess.

http://chessskill.blogspot.com/2009/01/blitz-addiction.html

For me its the same level