[thealfreds]

Games requiring long term focus, chess for example, I personally have difficulty playing when sleep deprived, even though it is turn based. I find I play at ~200 rating points lower on low sleep.

[adt2bt]

Agreed. Many a late sleepless night have I blown 200 points or more on frustrating blitz games. I would regularly play a game or two during lunch breaks, climb a good bit, then stay up too late one night and rage throw my points into the abyss.

[Spooky23]

I think it's an inverted U curve.

Games that require fast response and planning suffer on one extreme, and abstract thinking games like chess suffer on the other.

[koheripbal]

The real question is whether this penalty goes away once you adjust to your new sleep schedule.