In class we have been playing this really fun/frustrating game called Creating Squares.
It took me quite a while to win but here are some strategies and patterns that I found the computer uses to beat you;
1. Build a square around the computers square.
2. Build 2 squares at once. (once you get close to finishing both squares, the computer can't block them both at once)
3. "Try to predict what the computers move will be. (The moves that the computer uses are purely patterns and you will get a higher chance of winning)
Those are 3 of the strategies I used to win! I know some people just won on a fluke, but I used strategies for quite a while before I won.
This is a really fun game that I recommend you play because it is a maths game but it is quite addictive and really fun to play.