py-draughts 1.3.1

Description:

pydraughts 1.3.1

py-draughts



Efficient modern and flexible implementation of the draughts game with a beautiful web interface.
Supports multiple variants of the game and allows playing against AI.

Installation
pip install py-draughts

Documentation
Key features

Displays simple ascii board for different variants of the game.

>>> from draughts import get_board
>>> board = get_board('standard', "W:W4,11,28,31,K33,K34,38,40,K41,43,K44,45,K46,47:BK3,21,27,32")
>>> board
. . . . . B . w . .
. . . . . . . . . .
. w . . . . . . . .
. . . . . . . . . .
. b . . . . . . . .
. . b . w . . . . .
. w . b . W . W . .
. . . . w . . . w .
. W . . . w . W . w
W . w . . . . . . .

>>> board = get_board("american")
>>> board
. b . b . b . b
b . b . b . b .
. b . b . b . b
. . . . . . . .
. . . . . . . .
w . w . w . w .
. w . w . w . w
w . w . w . w .


Make and undo moves

>>> board.push_uci("31-27")
>>> board.pop() # undo last move
Move: 31->27
>>> board.turn
Color.WHITE


detects draws and wins


[!Important]
Those methods are variant specific. Each variant has different set of them.

>>> board.game_over
False
>>> board.is_threefold_repetition
False
>>> board.is_5_moves_rule
False
>>> board.is_16_moves_rule
False
>>> board.is_25_moves_rule
False
>>> board.is_draw
False


Validate and generate moves

>>> board.push_uci("31-22")
ValueError: 31-22 is correct, but not legal in given position.
Legal moves are: ['31-27', '31-26', '32-28', '32-27', '33-29', '33-28', '34-30', '34-29', '35-30']

>>> list(board.legal_moves)
['31-27', '31-26', '32-28', '32-27', '33-29', '33-28', '34-30', '34-29', '35-30']



Reads and writes fen strings


Writes PDN strings


>>> board.push_uci("31-27")
>>> board.push_uci("32-28")
>>> board.push_uci("27-23")
>>> board.push_uci("28-24")

>>> board.pdn
'[GameType "20"]
[Variant "Standard (international) checkers"]
[Result "-"]
1. 31-27 32-28 2. 27-23 28-24'

>>> board = get_board('standard', "W:W4,11,28,31,K33,K34,38,40,K41,43,K44,45,K46,47:BK3,21,27,32")
>>> board.fen
'[FEN "W:W4,11,28,31,K33,K34,38,40,K41,43,K44,45,K46,47:BK3,21,27,32"]'


Has simple engine

>>> from draughts.engine import AlphaBetaEngine
>>> engine = AlphaBetaEngine(depth=5)
>>> engine.get_best_move(board, with_evaluation=True)
Move: 28->37, 3.0

UI

Allows to play against AI.
Allows to play vs another player. (on the same computer)
Allows to test and find bugs in your engine.

python -m draughts.server.server

Use for testing your engine.
Example with simplest possible engine.
>>> from draughts import Server
>>> import numpy as np
>>> get_best_mv = lambda board: np.random.choice(list(board.legal_moves))
>>> server = Server(get_best_move_method=get_best_mv)
>>> server.run()
INFO: Started server process [1617]
INFO: Waiting for application startup.
INFO: Application startup complete.
INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

It is as simple as that!

[!Warning]
Server will not start when using google colab



Contributing
Contributions to this project are welcome. If you encounter any issues or have suggestions for improvements, please open an issue or submit a pull request on the project repository.
Bibliography

Notation
Rules and variants
List of PDNs
Draughts online
Additional 1 (Checkers online)
Additional 2 (Chinook)