Connect Four – Make Four in a Row Before the CPU
Choose a column for each red disc, use gravity to build horizontal, vertical or diagonal lines, and outplay a simple tactical CPU.
Click to Play
Connect Four
About Connect Four
Drop red discs into a 7-column board and connect four before the yellow CPU does. The board is 6 rows × 7 columns and pieces always fall to the lowest empty cell in the selected column.
The CPU first tests for an immediate winning move, then an immediate player win to block, then prefers columns [3,2,4,1,5,0,6]. Win detection checks horizontal, vertical and both diagonal directions for at least four connected discs.
How to Play Connect Four
1Click any non-full column during Red's turn.
2Build lines while watching for CPU threats that could connect four next turn.
3Connect four red discs horizontally, vertically or diagonally before the CPU connects yellow.
Connect Four Rules
- Players alternate Red human and Yellow CPU turns.
- A full column cannot accept another disc.
- If the top row becomes completely full without a four-in-a-row, the game is a draw.
Connect Four Scoring
| Action | Points | How it works |
|---|---|---|
| Connect four first | Win | — |
| Board fills with no winner | Draw | — |
Connect Four Game Mechanics
Objective
Drop red discs into a 7-column board and connect four before the yellow CPU does.
Round End
The game ends on a four-in-a-row for either side or a full-board draw.
- The board is 6 rows × 7 columns and pieces always fall to the lowest empty cell in the selected column.
- The CPU first tests for an immediate winning move, then an immediate player win to block, then prefers columns [3,2,4,1,5,0,6].
- Win detection checks horizontal, vertical and both diagonal directions for at least four connected discs.
- Results are session-only; this runtime does not save wins or match history.
Tips & Strategies
- Control the center columns because the CPU also prefers them after immediate tactical checks.
- Create two threats that cannot both be blocked in one CPU move rather than relying on a single obvious three-in-a-row.
Game Info
| Game Name | Connect Four |
| Category | Strategy |
| Difficulty | Hard |
| Platform | Web Browser |
| Price | Free |
| Players | 1 Player |
| Controls | Touch / Mouse |
| Last Updated | 2026-08-07 |
Frequently Asked Questions
How do I play Connect Four?
Drop red discs into a 7-column board and connect four before the yellow CPU does. Controls: touch, mouse.
How does scoring or progress work in Connect Four?
Connect four first: Win; Board fills with no winner: Draw
When does Connect Four end or reset?
The game ends on a four-in-a-row for either side or a full-board draw.
Does Connect Four save progress?
Results are session-only; this runtime does not save wins or match history.
Related Games
Minesweeper
Play Minesweeper online on a 10×10 board with 10 mines. Your first dig protects a 3×3 safe area; use Dig/Flag modes and clear every safe cell.
Tic Tac Toe
Play 3×3 Tic Tac Toe online as X. Easy AI is 60% random and 40% minimax; Unbeatable mode always uses minimax. Track wins, draws and AI wins.
Tower Defense
Play Tower Defense online with Basic, Sniper, Splash and Slow towers. Start with 100 gold and 20 HP, then survive scaling enemy waves and bosses.
Rock Paper Scissors
Play Rock Paper Scissors online against a random CPU. Track your wins, CPU wins, draws and current win streak across continuous rounds.
Color Fill
Play Color Fill online on a 10×10 board with 6 colors and a 25-move limit. Each new color flood-expands the connected top-left region until the board is one color.
Gomoku
Play Gomoku online on an 11×11 board as Black. Make 5+ in a row against an AI that scores attack, defense and center positions; player wins are saved locally.