Connect Four

A simple multiplayer implementation of the popular board game.

The project is split into two parts:

• Server: The server side part
• Client: The client consisting of an AWT user interface

The server retrieves two connections by two different clients and then starts the game.

Game Rules

• 2 Players (Yellow & Red)
• Yellow has the first move
• First player to connect four chips either horizontally, vertically or diagonally wins the game
• If neither player can achieve this until the board is full, the game ends in a tie

Protocol

Each segment is build like this:

Name	Length	Notes
Length	1 byte
Id	1 byte
Data	(Length - 1) * 1 byte	See the section below for details

The data field looks like the following, depending on the ID:

Server to Client

Id = 1 | Tile Update

Name	Length	Notes
row	1 byte
col	1 byte
new state	1 byte	0 = empty, 1 = Yellow, 2 = Red

Id = 2 | Win State

Name	Length	Notes
state	1 byte	0 = Draw, 1 = Yellow Wins, 2 = Red Wins

Id = 3 | Game Init

Name	Length	Notes
ownedState	1 byte	1 = You are Yellow, 2 = You are Red

Client to Server

Id = 1 | Column Select

Name	Length	Notes
col	1 byte

Note that the client is free to send this whenever it wants, and the server is to handle this appropriately