Tic-Tac-Toe Game In Python

Introduction

In this article, I am showing you how to create a very simple game of Tic-Tac-Toe in Python.

Tic-Tac-Toe is a very simple two-player game. So only two players can play at a time. This game is also known as Noughts and Crosses or Xs and Os game. One player plays with X, and the other player plays with O. In this game, we have a board consisting of a 3X3 grid. The number of grids may be increased.

The Tic-Tac-Toe board looks like the following

Rules of Game

1. Traditionally the first player plays with "X". So you can decide who wants to go with "X" and who wants to go with "O".
2. Only one player can play at a time.
3. If any of the players have filled a square, then the other player and the same player cannot override that square.
4. There are only two conditions that may match will be a draw or may win.
5. The player who succeeds in placing three respective marks (X or O) in a horizontal, vertical, or diagonal row wins the game.

Condition for wiining

Whoever places three respective marks (X or O) horizontally, vertically, or diagonally will be the winner.

The code for the game is as follows.

import os
import time

board = [' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
player = 1

# Win Flags
Win = 1
Draw = -1
Running = 0
Stop = 1

Game = Running
Mark = 'X'


def DrawBoard():
    print(" %c | %c | %c " % (board[1], board[2], board[3]))
    print("___|___|___")
    print(" %c | %c | %c " % (board[4], board[5], board[6]))
    print("___|___|___")
    print(" %c | %c | %c " % (board[7], board[8], board[9]))
    print(" | | ")


def CheckPosition(x):
    if board[x] == ' ':
        return True
    else:
        return False


def CheckWin():
    global Game

    if board[1] == board[2] and board[2] == board[3] and board[1] != ' ':
        Game = Win
    elif board[4] == board[5] and board[5] == board[6] and board[4] != ' ':
        Game = Win
    elif board[7] == board[8] and board[8] == board[9] and board[7] != ' ':
        Game = Win
    elif board[1] == board[4] and board[4] == board[7] and board[1] != ' ':
        Game = Win
    elif board[2] == board[5] and board[5] == board[8] and board[2] != ' ':
        Game = Win
    elif board[3] == board[6] and board[6] == board[9] and board[3] != ' ':
        Game = Win
    elif board[1] == board[5] and board[5] == board[9] and board[5] != ' ':
        Game = Win
    elif board[3] == board[5] and board[5] == board[7] and board[5] != ' ':
        Game = Win
    elif board[1] != ' ' and board[2] != ' ' and board[3] != ' ' and \
            board[4] != ' ' and board[5] != ' ' and board[6] != ' ' and \
            board[7] != ' ' and board[8] != ' ' and board[9] != ' ':
        Game = Draw
    else:
        Game = Running


print("Tic-Tac-Toe Game Designed By Sourabh Somani")
print("Player 1 [X] --- Player 2 [O]\n")
print()
print()
print("Please Wait...")
time.sleep(3)

while Game == Running:
    os.system('cls')
    DrawBoard()
    
    if player % 2 != 0:
        print("Player 1's chance")
        Mark = 'X'
    else:
        print("Player 2's chance")
        Mark = 'O'

    choice = int(input("Enter the position between [1-9] where you want to mark: "))
    if CheckPosition(choice):
        board[choice] = Mark
        player += 1
        CheckWin()

    os.system('cls')
    DrawBoard()
    
    if Game == Draw:
        print("Game Draw")
    elif Game == Win:
        player -= 1
        if player % 2 != 0:
            print("Player 1 Won")
        else:
            print("Player 2 Won")

Output