Connect Four

Drop discs and line up four. Play against clever AI or challenge a friend locally.

Turn

Red

Red Wins

Yellow Wins

Streak • Best

0 • 0

🎮 How to Play

Goal: Connect 4 discs of your color vertically, horizontally or diagonally.
Tap a column arrow or click a cell to drop. Discs stack from bottom.
Keys 1–7 drop in that column.
Block opponent's 3-in-a-row or you lose!
Streak counts consecutive wins. Best is saved.

Red moves first 7 × 6 board

⌨️ Controls

Click column / cell, 1-7 drop, U undo, N new game, M toggle mode.

Touch: Use top arrows. Hover preview shows drop position. Board locks during disc fall.

Tip vs AI: Control center — the AI loves it. Play defensive early, then force two threats.

🏆 Strategy Mode

AI uses minimax depth 4 + alpha-beta. It scores center control, windows of 4, and blocks your traps.

Modes: vs AI (unbeatable-ish) and 2 Players local.
You can play Red or Yellow. Red always starts per rules, but you can toggle who starts.
Undo rewinds last full turn (both players in vs AI).

About Connect Four

📁 Strategy 🎯 Difficulty: Easy ⏱️ Duration: 3–5 min ⚡ Instant Play (No Download) 📱 Desktop & Mobile

📖 How to Play & Objective

Drop your colored checkers into a 7-column vertical grid. Outsmart your opponent by connecting four consecutive discs in any direction before they do.

Discs drop straight down to the lowest unoccupied space in the selected column.
Win by connecting 4 of your colored discs horizontally, vertically, or diagonally.
Both players alternate turns one drop at a time.

🎮 Controls Guide

💻 Desktop:

Number keys 1–7 to select column ; or ← / → + Enter

📱 Mobile:

Tap the column header or column area where you wish to drop your disc

💡 Tips & Strategy

Control the central column (Column 4); it provides the most geometric winning lines.
Set up vertical traps where the opponent cannot block without giving you the win on the next turn.
Always scan diagonals — diagonal four-in-a-rows are the most frequently overlooked winning lines.