Perhaps you’re familiar with the peg board game. The board is filled with pegs, except for one empty spot. Regardless the size of the field of the board, the goal is to get the board down to only one peg remaining. Good luck with that. Basic knowledge of this game that many children have become familiar with is a key part of grasping how I assess talent.
Imagine a peg board in a bit of a crossed-T form. In the center, you have a field in the 4X4 or 5X5 range, and similar fields to the left, right, top, and bottom.