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Added Ai MiniMax functionality

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Rh17S15
2025-09-22 19:43:52 +02:00
parent 0694a20c79
commit 18e1fb9a1e
1 changed files with 123 additions and 59 deletions
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138
tictactoe.py
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@@ -1,7 +1,5 @@
# first two player tictactoe then one player against ai
# Ich hab jetzt einfach mal ohne OOP(bzw MVC/MVP) angefangen.
# Ich denke es ist einfacher es erst so zu machen und dann einzuteilen.
import os.path
import random
if os.path.isfile('./savestate.py'):
from savestate import save
@@ -15,11 +13,12 @@ field = [[" ", "|", " ", "|", " "],
player1 = True # bool that states which player is currently playing
player1_char = "X"
player2_char = "O"
draw = False
ai = False
# verbose = True
def printer(): # function that prints the field
print(" 0 1 2", end="\n")
for j in range(0, len(field)):
print("0" if j == 0 else "1" if j == 2 else "2" if j == 4 else " ", end=" ")
@@ -29,7 +28,13 @@ def printer(): # function that prints the field
def turn(): # function that checks whose turn it is and where they can place their symbol
if ai and not player1:
print("Next move is being calculated...")
best_move = minimax(field, not player1)
print("AI moved to ", best_move[1], best_move[2])
do_move(best_move[1], best_move[2])
# check_move(best_move[0], best_move[1], False)
else:
while True:
next_move_x = int(input(
f"Player {1 if player1 else 2} ({player1_char if player1 else player2_char}), please choose the x ("
@@ -48,62 +53,110 @@ def turn(): # function that checks whose turn it is and where they can place th
else:
print("Please be sure to input a valid number (0-2). \nPlease try Again.")
# it might be possible to compress the two above loops into one
return check_move(next_move_x, next_move_y)
return check_move(next_move_x, next_move_y, True)
def check_win():
global draw
for j in range(0, len(field), 2):
if field[j][0] == field[j][2] == field[j][4] == (player1_char if player1 else player2_char):
return True
elif field[0][j] == field[2][j] == field[4][j] == (player1_char if player1 else player2_char):
return True
if field[0][0] == field[2][2] == field[4][4] == (player1_char if player1 else player2_char):
return True
elif field[0][4] == field[2][2] == field[4][0] == (player1_char if player1 else player2_char):
return True
if all(field[j][k] != " " for j in range(len(field)) for k in range(len(field))):
# code to execute if all elements are not equal to " "
draw = True
return True
def check_win(ifield): # nothing 0, 0; draw 1, 1; win player1 1, 0; win player2 0, 1
for j in range(0, len(ifield), 2):
if ifield[j][0] == ifield[j][2] == ifield[j][4] == player1_char:
return 1, 0
elif ifield[j][0] == ifield[j][2] == ifield[j][4] == player2_char:
return 0, 1
elif ifield[0][j] == ifield[2][j] == ifield[4][j] == player1_char:
return 1, 0
elif ifield[0][j] == ifield[2][j] == ifield[4][j] == player2_char:
return 0, 1
if ifield[0][0] == ifield[2][2] == ifield[4][4] == player1_char:
return 1, 0
elif ifield[0][0] == ifield[2][2] == ifield[4][4] == player2_char:
return 0, 1
elif ifield[0][4] == ifield[2][2] == ifield[4][0] == player1_char:
return 1, 0
elif ifield[0][4] == ifield[2][2] == ifield[4][0] == player2_char:
return 0, 1
elif all(ifield[j][k] != " " for j in range(len(ifield)) for k in range(len(ifield))):
return 1, 1
else:
return False
return 0, 0
def do_move(x, y):
global player1 # Tells do_move to look for the global var player1
global draw
global player1
field[y][x] = (player1_char if player1 else player2_char)
printer()
if not check_win():
win = check_win(field)
if win == (0, 0):
f = open("savestate.py", "w")
f.write("save = " + repr(field))
f.close()
player1 = not player1
turn()
elif check_win():
if draw:
print("Its a draw.")
else:
print(f"Player {1 if player1 else 2} won")
elif win == (1, 1):
print("It's a draw.")
elif win == (1, 0):
print("Player 1 won")
if os.path.exists("savestate.py"):
os.remove("savestate.py")
elif win == (0, 1):
print("Player 2 won")
if os.path.exists("savestate.py"):
os.remove("savestate.py")
def check_move(x, y):
# translate x and y coordinates to field coordinates
def check_move(x, y, verbose):
x = int(x * 2)
y = int(y * 2)
if not field[y][x] == " ":
if verbose:
print("Your given coordinates are already occupied. \nPlease Try again.\n")
turn()
else:
do_move(x, y)
def minimax(current_field, is_maximizing):
checkwin = check_win(current_field)
if checkwin == (1, 1): # Draw
return 0, 0, 0
if checkwin == (1, 0): # Player wins
return -1, 0, 0
if checkwin == (0, 1): # AI wins
return 1, 0, 0
best_score = float('-inf') if is_maximizing else float('inf')
best_move = None
for j in range(0, len(current_field), 2):
for k in range(0, len(current_field), 2):
if current_field[j][k] == " ":
current_field[j][k] = player1_char if not is_maximizing else player2_char
score = minimax(current_field, not is_maximizing)[0]
current_field[j][k] = " "
if is_maximizing and score > best_score:
best_score = score
best_move = j, k
elif not is_maximizing and score < best_score:
best_score = score
best_move = j, k
if best_score == 0 and best_move == (0, 0): # is None:
empty_cells = [(j, k) for j in range(0, len(current_field), 2) for k in range(0, len(current_field), 2) if
current_field[j][k] == " "]
random.seed()
random_move = random.choice(empty_cells)
return 0, random_move[0], random_move[1]
else:
if best_move is None:
return 0, -1, -1 # No available moves
else:
print('The next best move is:', best_move, "score: ", best_score)
return best_score, best_move[1], best_move[0]
print("Welcome to Kat&Paul's TicTacToe:")
if os.path.isfile('./savestate.py'):
@@ -120,14 +173,25 @@ if os.path.isfile('./savestate.py'):
for k in range(0, len(field)):
if field[j][k] == " ":
spacecount += 1
# (player1 = True) if spacecount % 2 == 1 else (player1 = False)
if spacecount % 2 == 0:
player1 = False
break
inp = input("That was not a valid input. Type y/n if you want to continue or not: ")
'''if input("Do you want to play against AI or local multiplayer? 1/2: ") == "1":
ai = True'''
inp = input("Do you want to play against AI or local multiplayer? 1/2: ")
while True:
if inp == "1":
ai = True
break
elif inp == "2":
break
inp = input("That was not a valid input. Type 1/2 if you want to play against AI or local multiplayer: ")
printer()
print(f"Player {1 if player1 else 2} ({player1_char if player1 else player2_char}) will start playing.")
turn()