There is an intellectual puzzle 3x3, as in the photo:
You need to get an ordered set by moving the buttons through an empty area, like:
Question: Is a 4x4, 5x5, 6x6 game possible?
Sub-question: Does this game have an official name?
Thanks in advance for any comment/answer!
puzzle-identification
? This is essential to the original spirit of this site, as far back as question #80. $\endgroup$ – humn Jun 21 '20 at 14:49