Each square also has a specific terrain type. Figure 1. A 4-by-4 grid, which contains five creatures. Figure 1 shows a 4-by-4 grid populated by five creatures. Two of them belong to the species ...

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 goal of tic-tac-toe is to be the first player to get three in a row on a 3-by-3 grid or four in a row in a 4-by-4 grid. To start, one player draws a board, creating a grid of squares, usually 3-by ...