Squaring

In this Multiplayer 1v1 turn based game, your goal is to fill the 4 corners of a square before your opponent does.

The square can be any size, so it can be as small as a 2 by 2 square, or as large as the game board 10 by 10 square!

The key is to create your square before your opponent can create their square.
The screenshots will help you understand.