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Chess: randomly generated situations using Chess library

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Dejvino 2025-12-23 09:43:49 +01:00
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README.md
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@ -8,6 +8,19 @@ Simple homework printer using a thermal printer. Practice makes perfect!
pip install python-escpos[all] --user
```
### Chess module
```
pip install chess
```
## Config
Consult python-escpos docs:
- [Usage](https://python-escpos.readthedocs.io/en/latest/user/usage.html)
- [Available profiles](https://python-escpos.readthedocs.io/en/latest/printer_profiles/available-profiles.html)
## Run
```shell

66
jobs/chess_puzzle.py
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@ -1,4 +1,8 @@
import random
try:
import chess
except ImportError:
chess = None
from .base import Job
class ChessPuzzleJob(Job):
@ -6,32 +10,12 @@ class ChessPuzzleJob(Job):
return "SACHOVE ULOHY"
def print_body(self, p):
# (FEN, Instruction, Solution)
puzzles = [
("r1bqkb1r/pppp1ppp/2n2n2/4p2Q/2B1P3/8/PPPP1PPP/RNB1K1NR w KQkq - 4 4", "Bily na tahu. Mat 1. tahem.", "Qxf7# (Scholar's Mate)"),
("rnb1kbnr/pppp1ppp/8/4p3/6Pq/5P2/PPPPP2P/RNBQKBNR b KQkq - 1 3", "Cerny na tahu. Mat 1. tahem.", "Qh4# (Fool's Mate)"),
("6k1/5ppp/8/8/8/8/5PPP/4R1K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Re8# (Back Rank Mate)"),
("3r2k1/p4ppp/1p6/8/8/8/P4PPP/3R2K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Rxd8#"),
("6rk/5p1p/3N4/8/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Nf7# (Smothered Mate)"),
("8/4N1pk/8/7R/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Rh5# (Anastasia's Mate)"),
("7k/R7/5N2/8/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Rh7# (Arabian Mate)"),
("2kr4/1pp5/B7/8/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Ba6# (Boden's Mate)"),
("7k/6pp/6P1/7Q/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Qh7#"),
("6k1/5p1p/5PpQ/8/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Qg7# (Lolli's Mate)"),
("3k4/5ppp/8/6B1/8/8/5PPP/3R2K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Rd8# (Opera Mate)"),
("6k1/5P2/8/8/8/8/5PPP/6KR w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Rh8# (Anderssen's Mate)"),
("7k/5ppp/8/7Q/8/2B5/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Qxh7# (Damiano's Bishop Mate)"),
("4k3/8/4K3/8/8/8/8/5Q2 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Qf7# (Dovetail Mate)"),
("2rkr3/8/2Q5/8/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Qd7# (Swallow's Tail Mate)"),
("3rkr2/8/4Q3/8/8/8/5PPP/6K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Qe6# (Epaulette Mate)"),
("7k/6p1/8/8/2B5/8/5PPP/R5K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Rh1# (Greco's Mate)"),
("6k1/5pP1/5N2/8/8/8/5PPP/3R2K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Rd8# (Hook Mate)"),
("8/8/8/8/8/5K2/6Q1/7k w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Qg2#"),
("k7/1R6/8/8/8/8/8/R5K1 w - - 0 1", "Bily na tahu. Mat 1. tahem.", "Ra8# (Ladder Mate)")
]
if chess is None:
p.text("CHYBA: Neni nainstalovana knihovna 'chess'.\n")
p.text("Spust: pip install chess\n\n")
return
puzzle = random.choice(puzzles)
fen, instruction, solution = puzzle
fen, instruction, solution = self.generate_puzzle()
p.text(f"{instruction}\n\n")
self.print_board(p, fen)
@ -44,6 +28,38 @@ class ChessPuzzleJob(Job):
p.text("Reseni (naskenuj):\n")
p.qr(solution, size=6, native=True)
def generate_puzzle(self):
"""
Simulates a random game until a 'Mate in 1' situation arises.
"""
while True:
board = chess.Board()
# Play up to 120 ply (60 moves)
for _ in range(120):
if board.is_game_over():
break
legal_moves = list(board.legal_moves)
random.shuffle(legal_moves)
# Check if any move leads to immediate checkmate
for move in legal_moves:
board.push(move)
if board.is_checkmate():
# Found a puzzle!
board.pop() # Revert to state before mate
board.pop()
solution = board.san(move)
turn = "Bily" if board.turn == chess.WHITE else "Cerny"
return board.fen(), f"{turn} na tahu. Mat jednim tahem.", solution
board.pop()
# No mate found, play a random move to progress the game
if legal_moves:
board.push(random.choice(legal_moves))
else:
break
def print_board(self, p, fen):
board_str = fen.split(' ')[0]
rows = board_str.split('/')