Related to Open Problem #1: In the Corner

Logic Level 2

On a chessboard of a finite size, we want to place kings and knights such that each king attacks exactly 2 kings and 2 knights and each knight attacks exactly 2 kings and 2 knights.

What can we say about the square adjacent to a corner (horizontally or vertically, not diagonally)?

The possible attacks of a knight are shown on the left, and the possible attacks of a king are shown on the right.

The possible attacks of a knight are shown on the left, and the possible attacks of a king are shown on the right.

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