[hollerith]

Actually, not being so complex that I actually need to think is what I really like about 0hh1.com.

It requires a non-zero but pretty low level of "executive function", but significantly less than most logic puzzles.

In particular, a few times per game, I have to apply a little bit of "frontal-lobe" or higher-level skill to prevent myself from losing my patience for constantly applying the lower-level or "perceptual" skills required by 0hh1. In particular, I have to apply frontal-lobe skills to resist the temptation to engage in the "wishful thinking" of falsely believing I have perceived a correct next move to make.

(I engage in 0hh1.com mostly to relax or unwind, not to hone any higher-level skill.)