Creating a chess game app involves multiple components including the game logic, a user interface (UI), and possibly networking features if you want multiplayer functionality. Below is a simple example of a Python script that uses the `pygame` library for the UI and `chess` library for game logic. This will set up a basic chess game with a GUI where two players can play against each other.
### Requirements
You will need to install the following Python packages:
- `pygame`: For the GUI
- `python-chess`: For the chess game logic
You can install these packages via pip:
```bash
pip install pygame python-chess
```
### Simple Chess Game App Script
```python
import pygame
import chess
import chess.svg
# Initialize Pygame
pygame.init()
# Constants
SCREEN_WIDTH = 480
SCREEN_HEIGHT = 480
SQUARE_SIZE = SCREEN_WIDTH // 8
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
# Load chess board and pieces
board = chess.Board()
# Screen setup
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Chess")
# Load images for the chess pieces
piece_images = {}
for piece in ['p', 'r', 'n', 'b', 'q', 'k', 'P', 'R', 'N', 'B', 'Q', 'K']:
piece_images[piece] = pygame.image.load(f'assets/{piece}.png').convert_alpha()
piece_images[piece] = pygame.transform.scale(piece_images[piece], (SQUARE_SIZE, SQUARE_SIZE))
def draw_board():
colors = [WHITE, BLACK]
for row in range(8):
for col in range(8):
color = colors[(row + col) % 2]
pygame.draw.rect(screen, color, pygame.Rect(col * SQUARE_SIZE, row * SQUARE_SIZE, SQUARE_SIZE, SQUARE_SIZE))
def draw_pieces():
for row in range(8):
for col in range(8):
piece = board.piece_at(chess.square(col, 7-row))
if piece:
screen.blit(piece_images[piece.symbol()], pygame.Rect(col * SQUARE_SIZE, row * SQUARE_SIZE, SQUARE_SIZE, SQUARE_SIZE))
def get_square_under_mouse():
mouse_pos = pygame.Vector2(pygame.mouse.get_pos())
x, y = [int(v // SQUARE_SIZE) for v in mouse_pos]
return chess.square(x, 7 - y)
def main():
clock = pygame.time.Clock()
selected_square = None
running = True
while running:
draw_board()
draw_pieces()
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.MOUSEBUTTONDOWN:
square = get_square_under_mouse()
if selected_square is None:
if board.piece_at(square):
selected_square = square
else:
move = chess.Move(selected_square, square)
if move in board.legal_moves:
board.push(move)
selected_square = None
pygame.display.flip()
clock.tick(60)
pygame.quit()
if __name__ == "__main__":
main()
```
### Explanation:
- **Pygame**: Handles the GUI for the chessboard and pieces.
- **chess.Board()**: Represents the chessboard and handles game logic, move legality, and checkmate conditions.
- **Images**: Piece images need to be in an `assets` folder, named by their respective piece symbols (e.g., `p.png` for a black pawn, `P.png` for a white pawn).
- **Main Loop**: Handles events such as selecting and moving pieces, updating the display, and checking for quit events.
### Asset Preparation:
You need images for each piece. You can find or create 64x64 PNG images for each piece (`p.png`, `r.png`, `n.png`, `b.png`, `q.png`, `k.png`, `P.png`, `R.png`, `N.png`, `B.png`, `Q.png`, `K.png`) and put them in an `assets` directory.
### Running the Script
Once everything is set up, running the script should open a window displaying the chessboard. You can click on pieces to move them, and the game will enforce the rules of chess.
This script covers the basics. To add features like move history, undo/redo, or AI opponents, you'll need to extend this code with additional logic.
