Threes and fours in Five in a Row
Learn the threats that drive every game of Five in a Row: the open three, the four and how each one forces a reply. Threats · lesson 1 of 4.
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A four threatens to make five next turn, so your opponent must block it. An open three threatens to become an open four, so it must be blocked too.
Making these threats lets you choose where your opponent plays.
You have two in a row with plenty of space around it.
Try it: Make an open three.
Ivory has blocked one end of your three.
Try it: Make a four.
Every three and four forces a reply. Next: the open four.