# Project 2: Tic-Tac-Toe Game

## Introduction

In this chapter, we will learn to implement a Tic-Tac-Toe game in Python.

## Tic-Tac-Toe

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:

## Game Rules

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 that succeeds in placing three respective marks (X or O) in a horizontal, vertical, or diagonal row wins the game.

## Winning condition

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

The code for the game is as follows,
1. import os
2. import time
3.
4. board = [' ',' ',' ',' ',' ',' ',' ',' ',' ',' ']
5. player = 1
6.
7. ########win Flags##########
8. Win = 1
9. Draw = -1
10. Running = 0
11. Stop = 1
12. ###########################
13. Game = Running
14. Mark = 'X'
15.
16. #This Function Draws Game Board
17. def DrawBoard():
18.     print(" %c | %c | %c " % (board[1],board[2],board[3]))
19.     print("___|___|___")
20.     print(" %c | %c | %c " % (board[4],board[5],board[6]))
21.     print("___|___|___")
22.     print(" %c | %c | %c " % (board[7],board[8],board[9]))
23.     print("   |   |   ")
24.
25. #This Function Checks position is empty or not
26. def CheckPosition(x):
27.     if(board[x] == ' '):
28.         return True
29.     else:
30.         return False
31.
32. #This Function Checks player has won or not
33. def CheckWin():
34.     global Game
35.     #Horizontal winning condition
36.     if(board[1] == board[2and board[2] == board[3and board[1] != ' '):
37.         Game = Win
38.     elif(board[4] == board[5and board[5] == board[6and board[4] != ' '):
39.         Game = Win
40.     elif(board[7] == board[8and board[8] == board[9and board[7] != ' '):
41.         Game = Win
42.     #Vertical Winning Condition
43.     elif(board[1] == board[4and board[4] == board[7and board[1] != ' '):
44.         Game = Win
45.     elif(board[2] == board[5and board[5] == board[8and board[2] != ' '):
46.         Game = Win
47.     elif(board[3] == board[6and board[6] == board[9and board[3] != ' '):
48.         Game=Win
49.     #Diagonal Winning Condition
50.     elif(board[1] == board[5and board[5] == board[9and board[5] != ' '):
51.         Game = Win
52.     elif(board[3] == board[5and board[5] == board[7and board[5] != ' '):
53.         Game=Win
54.     #Match Tie or Draw Condition
55.     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]!=' '):
56.         Game=Draw
57.     else:
58.         Game=Running
59.
60. print("Tic-Tac-Toe Game Designed By Sourabh Somani")
61. print("Player 1 [X] --- Player 2 [O]\n")
62. print()
63. print()
65. time.sleep(3)
66. while(Game == Running):
67.     os.system('cls')
68.     DrawBoard()
69.     if(player % 2 != 0):
70.         print("Player 1's chance")
71.         Mark = 'X'
72.     else:
73.         print("Player 2's chance")
74.         Mark = 'O'
75.     choice = int(input("Enter the position between [1-9] where you want to mark : "))
76.     if(CheckPosition(choice)):
77.         board[choice] = Mark
78.         player+=1
79.         CheckWin()
80.
81. os.system('cls')
82. DrawBoard()
83. if(Game==Draw):
84.     print("Game Draw")
85. elif(Game==Win):
86.     player-=1
87.     if(player%2!=0):
88.         print("Player 1 Won")
89.     else:
90.         print("Player 2 Won")

## Conclusion

In the next chapter, we will learn how to make a music instrument using Python.
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