Drop four in a row before your opponent does.

Play against a friend or test your instincts against our AI.

Quick setup

Start playing Connect 4

Choose local or remote play, set each side, and jump into a fast game of timing, traps, and smart positioning.

ⓘ How to start ⓘ Full guide

Game mode

Single Screen/PC · vs. a friend or AI

Red

Yellow

AI Difficulty

Connect 4 Online

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Red wins 0

Yellow wins 0

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Connect 4 is a two-player game where you drop colored discs into a 7×6 grid.
First to connect four in a row - horizontally, vertically, or diagonally - wins.

Read the full Connect 4 guide →
Rules with diagrams, winning strategy, and FAQ on one page.

How to start

In the quick setup.

Choose game mode - Local or Remote
- Local - one screen, one computer. Drop discs against a friend side-by-side, or take on the AI.
- Remote - play online from wherever you are. Click Create game for a 6-digit code, share it, and your opponent joins right away.
For Local setup
- Set Red and Yellow to be a Human (you) or challenge the AI.
- If you choose the AI, pick the AI difficulty (1 (easy) - 5 (deep thinking)).
- After choosing sides and opponent, click Start game to start.
For Remote setup
- Create Game
  - Choose your preferred side (Red / Yellow).
  - Press Create Game.
  - Pass the 6-digit code to your friend.
  - Wait for your friend to connect as well.
- Join Game
  - Get the code from your friend (the creator of the game).
  - No need to touch the setup - the creator defines all params.
  - Write the game code in the Code text box.
  - Press Join.
  - The game starts as soon as the connection is established.
- When a game ends, you can immediately start a new one with the same parameters, or change the configuration and try differently.

Step-by-step setup with screenshots in the guide FAQ →

How to play

Click a column (or the arrow above it) to drop your disc.
Discs fall to the lowest available row in that column.
Red always goes first. Turns alternate between Red and Yellow.
A column is blocked once it is full - plan ahead to avoid getting trapped.

Game rules

Board 7 columns × 6 rows. Discs fall by gravity.

Win condition Connect four or more of your discs in a row, horizontal, vertical, or diagonal.

Draw If all 42 squares are filled with no winner, the game is a draw.

Strategy tip Control the centre columns - they create more winning opportunities than the edges.

Full rules with diagrams → · Winning strategy →

Try another game

Chess Deep strategy on a classic 8×8 board - challenge a friend or our AI.

Checkers Classic diagonal strategy with American and International rulesets.

Backgammon Dice strategy, checker movement, and race tactics.

Dominion Original hex strategy - control territory, supply lines, and siege the enemy Nexus.

Walls Strategic race, block your opponent's path while protecting your own.

About Connect 4

Connect 4 looks simple - and then suddenly you’re one move away from losing and you don’t know how it happened.
That’s the magic of it. Our AI plays aggressively at higher levels, so there’s always a challenge waiting.
If you have ideas for new features, difficulty tweaks, or just want to share a result you’re proud of, reach out - we read every message.

Get in touch

Spotted a bug, have a suggestion, or just want to brag about a win?
Reach out at

Connect 4 game ended

Learn the game. Then beat the AI.

Guide

Leaderboard