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added cpu chess moving

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This commit is contained in:
Rudis Muiznieks 2022-04-24 18:18:50 -05:00
parent 39a3e33a06
commit 94befd04ee
Signed by: rudism
GPG key ID: CABF2F86EF7884F9
3 changed files with 53 additions and 31 deletions
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51
plugin/chess/__init__.py
View file

@ -1,5 +1,6 @@
from os import path
from enum import Enum, auto
import time
import re
import itertools
from cinput import ControlInput, Button
@ -9,37 +10,56 @@ from . import sunfish
class GameState(Enum):
MAIN_MENU = auto()
PLAYING = auto()
THINKING = auto()
CHOOSE_ROW = auto()
CHOOSE_COL = auto()
GAME_OVER = auto()
SAVE_FILE = path.join("data", "chess_state.fen")
MAX_THINKING_SECONDS = 3
def execute(cinput: ControlInput, graphics: Graphics, _):
graphics.clear()
draw = Draw(graphics)
pos: sunfish.Position
hist: list[sunfish.Position]
searcher = sunfish.Searcher()
if path.exists(SAVE_FILE):
with open(SAVE_FILE, "r") as fen:
fenstr = fen.read()
pos = parseFEN(fenstr)
hist = [parseFEN(fenstr)]
else:
pos = sunfish.Position(
sunfish.initial, 0, (True,True), (True,True), 0, 0)
hist = [sunfish.Position(
sunfish.initial, 0, (True,True), (True,True), 0, 0)]
draw.draw_board(pos.board)
player_color = 'wb'[get_color(hist[-1])]
draw.draw_board(hist[-1].board if player_color == 'w' else hist[-1].rotate().board)
state = GameState.MAIN_MENU
menu_index = 0
move = None
score = None
last_move = "Begin!"
while True:
if state == GameState.MAIN_MENU:
draw.draw_menu(menu_index)
elif state == GameState.PLAYING:
draw.draw_state()
elif state == GameState.THINKING:
draw.draw_thinking()
start = time.time()
for _, move, score in searcher.search(hist[-1], hist):
if time.time() - start > MAX_THINKING_SECONDS:
break
hist.append(hist[-1].move(move))
draw.draw_board(hist[-1].board if player_color == 'b' else hist[-1].rotate().board)
shift = -119 if player_color == 'b' else 0
last_move = sunfish.render(shift+move[0]) + " -> " + sunfish.render(shift+move[1])
if score == sunfish.MATE_UPPER:
draw.draw_checkmate(last_move, False)
state = GameState.GAME_OVER
else:
draw.draw_rowsel(last_move)
state = GameState.CHOOSE_ROW
key = cinput.get_one_shot()
if state == GameState.MAIN_MENU:
@ -53,20 +73,22 @@ def execute(cinput: ControlInput, graphics: Graphics, _):
menu_index = 3
elif key == Button.BTN_B:
if menu_index == 0:
state = GameState.PLAYING
state = GameState.CHOOSE_ROW
elif menu_index == 1:
with open(SAVE_FILE, "w") as fen:
fen.write(renderFEN(pos))
fen.write(renderFEN(hist[-1]))
return
elif menu_index == 2 or menu_index == 3:
pos = sunfish.Position(
sunfish.initial, 0, (True,True), (True,True), 0, 0)
if menu_index == 3:
pos = pos.rotate()
state = GameState.THINKING
else:
state = GameState.CHOOSE_ROW
hist = [pos]
draw.draw_board(pos.board)
state = GameState.PLAYING
elif state == GameState.PLAYING:
else:
if key == Button.BTN_A:
state = GameState.MAIN_MENU
@ -74,7 +96,6 @@ def get_color(pos):
return 1 if pos.board.startswith('\n') else 0
def parseFEN(fen):
""" Parses a string in Forsyth-Edwards Notation into a Position """
board, color, castling, enpas, _, _ = fen.split()
board = re.sub(r'\d', (lambda m: '.'*int(m.group(0))), board)
board = list(21*' ' + ' '.join(board.split('/')) + 21*' ')
@ -90,7 +111,7 @@ def parseFEN(fen):
def renderFEN(pos, half_move_clock=0, full_move_clock=1):
color = 'wb'[get_color(pos)]
if get_color(pos) == 1:
if color == 'b':
pos = pos.rotate()
board = '/'.join(pos.board.split())
board = re.sub(r'\.+', (lambda m: str(len(m.group(0)))), board)

20
plugin/chess/draw.py
View file

@ -80,7 +80,6 @@ class Draw:
def draw_board(self, board: str):
ic(board)
is_black = board.startswith('\n')
self._graphics.fill_rect(0, 0, self.BOARD_SIZE, self.BOARD_SIZE, 0)
nb = "".join(board.split())
c = True
@ -93,7 +92,7 @@ class Draw:
p = nb[(row * 8) + col]
if p.lower() in self.PIECES:
self._draw_piece(
self.PIECES[p.lower()], p.isupper() if not is_black else p.islower(), col, row, c)
self.PIECES[p.lower()], p.isupper(), col, row, c)
c = not c
c = not c
self._graphics.show()
@ -106,6 +105,21 @@ class Draw:
self._graphics.text(marker + self.MENU[i], 12, i + 2, 1)
self._graphics.show()
def draw_state(self):
def draw_thinking(self):
self._clear_info()
self._graphics.text("Shh, I'm", 12, 0, 1)
self._graphics.text("thinking!", 12, 1, 1)
self._graphics.show()
def draw_checkmate(self, move: str, player_won: bool):
self._clear_info()
self._graphics.text(move, 12, 0, 1)
self._graphics.text("Checkmate", 12, 1, 1)
self._graphics.text(
"you win!" if player_won else "you lose!", 12, 2, 1)
self._graphics.show()
def draw_rowsel(self, move: str):
self._clear_info()
self._graphics.text(move, 12, 0, 1)
self._graphics.show()

13
plugin/chess/sunfish.py
View file

@ -378,10 +378,6 @@ class Searcher:
# User interface
###############################################################################
# Python 2 compatability
if sys.version_info[0] == 2:
input = raw_input
def parse(c):
fil, rank = ord(c[0]) - ord('a'), int(c[1]) - 1
@ -393,15 +389,6 @@ def render(i):
return chr(fil + ord('a')) + str(-rank + 1)
def print_pos(pos):
print()
uni_pieces = {'R':'♜', 'N':'♞', 'B':'♝', 'Q':'♛', 'K':'♚', 'P':'♟',
'r':'♖', 'n':'♘', 'b':'♗', 'q':'♕', 'k':'♔', 'p':'♙', '.':'·'}
for i, row in enumerate(pos.board.split()):
print(' ', 8-i, ' '.join(uni_pieces.get(p, p) for p in row))
print(' a b c d e f g h \n\n')
def main():
hist = [Position(initial, 0, (True,True), (True,True), 0, 0)]
searcher = Searcher()