i made a whole neural network but it was depressingly bad. imma try minmax with alphabeta pruning for look ahead

This commit is contained in:
Vincent Rodley 2025-08-12 10:43:16 +12:00
parent 760c412a45
commit 9a47d3fd85
3 changed files with 13 additions and 82 deletions

2
.gitignore vendored
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@ -1 +1,3 @@
__pycache__/
env/
test.py/

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@ -1,74 +0,0 @@
import numpy as np
class Connect4Env:
ROWS = 6
COLS = 7
EMPTY = 0
PLAYER1 = 1
PLAYER2 = -1
def __init__(self):
self.board = np.zeros((self.ROWS, self.COLS), dtype=np.int8)
self.current_player = self.PLAYER1
def reset(self):
self.board[:] = 0
self.current_player = self.PLAYER1
return self.get_state()
def get_state(self):
return self.board.copy(), self.current_player
def available_actions(self):
return [col for col in range(self.COLS) if self.board[0, col] == 0]
def step(self, action):
if action not in self.available_actions():
raise ValueError("Invalid action")
for row in reversed(range(self.ROWS)):
if self.board[row][action] == 0:
self.board[row][action] = self.current_player
break
done, winner = self.check_win()
reward = 0
if done:
if winner == 0:
reward = 0 # draw
elif winner == self.current_player:
reward = 1
else:
reward = -1
self.current_player *= -1
return self.get_state(), reward, done
def check_win(self):
for row in range(self.ROWS):
for col in range(self.COLS - 3):
line = self.board[row, col:col + 4]
if abs(sum(line)) == 4:
return True, np.sign(sum(line))
for row in range(self.ROWS - 3):
for col in range(self.COLS):
line = self.board[row:row + 4, col]
if abs(sum(line)) == 4:
return True, np.sign(sum(line))
for row in range(self.ROWS - 3):
for col in range(self.COLS - 3):
diag = [self.board[row + i][col + i] for i in range(4)]
if abs(sum(diag)) == 4:
return True, np.sign(sum(diag))
for row in range(3, self.ROWS):
for col in range(self.COLS - 3):
diag = [self.board[row - i][col + i] for i in range(4)]
if abs(sum(diag)) == 4:
return True, np.sign(sum(diag))
if all(self.board[0, :] != 0):
return True, 0 # draw
return False, None

17
main.py
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@ -1,6 +1,5 @@
import os
import sys
import socket
from colours import Colours as C
# ===========================
@ -77,11 +76,16 @@ def local_move_provider(player, board):
col = getIntInput(f"{colourTile(player)} where do you want to drop your tile? 1-7.\n>>> ", board) - 1
return col
def socket_receive_move(sock):
return int(sock.recv(1024).decode())
def cpu_move_provider(player, board):
def socket_send_move(sock, col):
sock.sendall(str(col).encode())
i = 0
while i < len(board):
if any([t == 'O' for t in board[i]]):
break
else:
i += 1
print(i)
return i
# ===========================
# | Main game loop |
@ -136,8 +140,7 @@ def play_lan_client():
return
def play_vs_computer():
print("PvC mode coming soon!")
input("Press Enter to return to menu...")
play_game(cpu_move_provider, local_move_provider)
# ===========================
# | Menu |