Blocking in Four in a Row: stop the other four
Before every move, check whether your opponent can win next turn. Learn to spot and block their threats across rows and diagonals. How Four in a Row works · lesson 3 of 3.
The lesson in words
Ivory has three in a row along the bottom. If you don’t stop it, Ivory wins next turn.
A space where a player could win on their next move is called a threat.
Try it: Block Ivory’s four.
Diagonal threats are easy to miss.
Try it: Ivory can win next turn. Find the space and fill it.
Check for their threats before every move. Next: a quick rules check.
Questions
Your opponent has two different spaces that would each win. What can you do?
You can only block one, so they win with the other. That’s why two threats at once is so strong. You’ll learn to make them yourself soon.