The classic sliding block puzzle. The 15-puzzle consists of a 4-by-4 grid with tile numbered $1$ to $15$ placed in the grid. The object of this puzzle is to randomly arrange the tiles on the grid, and ...

The finished puzzle is a section of the periodic table, so the numbers on each tile are their atomic numbers - that means they increase from left to right and top to bottom. Another helpful clue ...

So the rules are that the tile should not overlap and cannot be resized. The fun teaser was shared on the Reddit sub “r/puzzles” by user “endersgame_reviewer.” The comment section ...