pydraughts

pydraughts is a draughts (checkers) library for Python with move generation, PDN reading and writing, engine communication and balloted openings. It is based on ImparaAI/checkers.

Installing

Download and install the latest release:

pip install pydraughts

Features

Variants:

• Standard (International)
• Frisian
• frysk!
• Antidraughts
• Breakthrough
• Russian
• Brazilian
• English/American
• Italian
• Turkish

Engine protocols:

• Hub
• DXP
• CheckerBoard

PDN Reading and Writing

• Import pydraughts

from draughts import Board, Move, WHITE, BLACK

• Create a game

board = Board(variant="standard", fen="startpos")

• Make a move

move = Move(board, steps_move=[34, 30])
board.push(move)

# Multi-capture
board2 = Board(fen="W:WK40:B19,29")
board2.push(Move(board2, pdn_move='40x14'))

• Get a visual representation of the board

print(board)

"""
   | b |   | b |   | b |   | b |   | b 
---------------------------------------
 b |   | b |   | b |   | b |   | b |   
---------------------------------------
   | b |   | b |   | b |   | b |   | b 
---------------------------------------
 b |   | b |   | b |   | b |   | b |   
---------------------------------------
   |   |   |   |   |   |   |   |   |   
---------------------------------------
   |   |   |   |   |   |   |   | w |   
---------------------------------------
   | w |   | w |   | w |   |   |   | w 
---------------------------------------
 w |   | w |   | w |   | w |   | w |   
---------------------------------------
   | w |   | w |   | w |   | w |   | w 
---------------------------------------
 w |   | w |   | w |   | w |   | w |   
"""

• Get legal moves

moves = board.legal_moves()

• Detect wins and draws

has_white_won = board.winner() == WHITE
is_draw = board.winner() == 0
winnner = board.winner()
is_game_over = board.is_over()

• Convert move to other types

move = Move(board, board_move=moves[0].board_move).pdn_move

• Get fen

fen = game.fen

• Communicate with engines

from draughts.engine import HubEngine, Limit
engine = HubEngine(["scan.exe", "hub"])
engine.init()
limit = Limit(time=10)
engine_move = engine.play(board, limit, ponder=False)

• Read PDN games

from draughts.PDN import PDNReader
games = PDNReader(filename=filepath)
game = games.games[0]
moves = game.moves

• Write PDN games

from draughts.PDN import PDNWriter
games = PDNWriter(filename=filepath, board=board)

• Get a ballot

from draughts.ballots import Ballots
ballots = Ballots('english')
ballot1 = ballots.get_ballot()
ballot2 = ballots.get_ballot()

• Run tournaments

from draughts.tournament import RoundRobin
player1 = (["scan.exe", "hub"], "hub", {}, None)
player2 = ("kr_hub.exe", "hub", {}, None)
players = [player1, player2]
tournament = RoundRobin("tournament.pdn", players, start_time=20, increment=0.2, games_per_pair=4)
scores = tournament.play()
print(scores)
tournament.print_standings()

Example Engines

Some engines that can be used with pydraughts.

Engine	Protocol
Kingsrow (international)	Hub & DXP
Scan	Hub & DXP
Moby Dam	DXP
Kingsrow (english)	CheckerBoard
Kingsrow (italian)	CheckerBoard
Cake	CheckerBoard
Kallisto	CheckerBoard

Selected Projects

If you like, share your interesting project that uses pydraughts.

Projects
Checkers Reinforcement Learning — https://github.com/d3da/checkers-rl

Acknowledgements

Thanks to fishnet which was modified to add support for Hub engines. Thanks to akalverboer for their DXC100_draughts_client which was modified to add support for DXP engines.

License

pydraughts is licensed under The MIT License. Check out LICENSE for the full text. The licenses of the other projects that pydraughts uses are in the other_licenses folder.