About Connect Four
Connect Four is the vertical strategy classic solved by computers in 1988 — the first player wins with perfect play. Drop discs into columns, build lines of four, and out-think a CPU that looks several moves ahead.
How to Play Connect Four
- 1Tap a column to drop your red disc; it falls to the lowest free slot.
- 2The CPU answers with yellow.
- 3Connect four of your discs in a row — across, down, or diagonally — to win.
- 4The board filling completely with no line is a draw.
Tips & Strategy
- ◆Claim the centre column early — it participates in more four-in-a-row lines than any other.
- ◆Watch for "odd threats": a winning square on an odd row is gold for the first player.
- ◆Never drop a disc that gives the CPU a winning square directly above it.
- ◆Stack double threats vertically and diagonally at once; single threats are always blocked.
Frequently Asked Questions
Is Connect Four solved?
Yes — with perfect play the first player wins by starting in the centre column. Our CPU is strong but not perfect, so victory is achievable.
How deep does the CPU think?
It evaluates several moves ahead with a minimax search, prioritising wins, blocks and centre control.
What does my score represent?
Rounds won this session — beat the CPU repeatedly to push it up.