👉 A knapped is a type of puzzle that involves placing three or more different objects in a single line, with each object having one of its ends knapped. The goal is to place all the objects on the line so that they are not visible from the opposite direction.
For example:
Puzzle A: Three blocks (A, B, and C) arranged in a line
Puzzle B: Four stones (A, B, C, D) arranged in a line