Connect Four

Connect Four | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Games
Input types: select
Output type: interactive
Sample coverage: 4
API ready: Yes

Overview

Play the classic Connect Four game directly in your browser on a standard 7×6 grid, choosing between a heuristic AI, a challenging alpha-beta pruning AI, or a local friend.

When to use

When you want to test your strategic thinking against a challenging alpha-beta pruning AI opponent.
When you want to play a quick, local two-player game of Connect Four with a friend on the same screen.
When you need a quick mental break or want to practice basic spatial reasoning and blocking tactics.

How it works

1Select your opponent mode, choosing between easy heuristic AI, hard alpha-beta AI, or local two-player mode.
2Choose which player goes first, setting either Red (you) or Yellow (opponent) to make the opening move.
3Click on any of the seven columns to drop your colored piece, which falls to the lowest available space due to gravity.
4Take turns until one player aligns four of their pieces horizontally, vertically, or diagonally to win the game.

Use cases

Practicing tactical board game strategies against a deep-searching alpha-beta algorithm.
Passing the time with a local friend using the shared-screen two-player mode.
Teaching children basic spatial planning, pattern recognition, and gravity-based mechanics.

Examples

1. Challenging the Hard AI

Casual Gamer

Background

A player wants to test their strategic skills against a computer opponent that doesn't make obvious mistakes.

Problem

Finding a challenging offline opponent to practice advanced Connect Four opening traps.

How to use

Set the Opponent Mode to 'AI - Hard (alpha-beta)' and choose Red to go first.

{"opponentMode": "ai-hard", "firstPlayer": "R"}

Outcome

The game starts with the player as Red, playing against a highly defensive and tactical alpha-beta AI.

2. Local Pass-and-Play Match

Parent

Background

A parent wants to play a quick game of Connect Four with their child on a single tablet during a road trip.

Problem

Playing a physical board game in a moving vehicle is impractical due to loose pieces.

How to use

Select 'Two players (local)' as the Opponent Mode and start the game.

FAQ

What is the difference between the Easy and Hard AI modes?

The Easy AI uses simple heuristic evaluations for quick moves, while the Hard AI uses alpha-beta pruning to search multiple moves ahead for optimal play.

Can I play this game with a friend on the same device?

Yes, select the 'Two players (local)' option to take turns dropping pieces on the same screen.

What are the dimensions of the game board?

The game uses the standard Connect Four board size of 7 columns by 6 rows.

How do you win a match?

You win by being the first player to form a continuous line of four of your colored pieces horizontally, vertically, or diagonally.

Can I choose who makes the first move?

Yes, you can configure the first player option to start as Red (you) or let Yellow (the opponent) go first.

{"opponentMode": "2-player", "firstPlayer": "R"}

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Challenging the Hard AI

2. Local Pass-and-Play Match

FAQ

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