diff --git a/carpet.py b/carpet.py
new file mode 100644
index 0000000..4f25f64
--- /dev/null
+++ b/carpet.py
@@ -0,0 +1,136 @@
+from enum import Enum, auto
+from random import shuffle
+
+class Suit(Enum):
+	CLUBS = auto()
+	HEARTS = auto()
+	DIAMONDS = auto()
+	SPADES = auto()
+
+class Game:
+	def __init__(self):
+		self.foundations = {suit: 1 for suit in Suit}
+		self.deck = self.get_random_pile()
+		self.carpet = set(self.deck[-20:])
+		self.free_cells = 0
+		self.moves = 0
+		self.deck = self.deck[:-20]
+		self.offers = [self.deck.pop()]
+	
+	def get_random_pile(self):
+		cards = {(suit, value) for suit in Suit for value in range(2, 13+1)}
+		deck = list(cards)
+		shuffle(deck)
+		return deck
+
+	def can_drop(self, card):
+		suit, value = card
+		return self.foundations[suit] == value - 1
+		# FIXME: use this function.
+	def can_move(self):
+		if len(self.deck) > 0: return True
+		if len(self.offers) > 0 and self.can_drop(self.offers[-1]): return True
+		if any(self.can_drop(card) for card in self.carpet): return True
+		if self.free_cells > 0: return True
+		return False
+
+	def count_move(self):
+		self.moves += 1
+
+	# Possible moves
+	def drop_from_carpet(self, card):
+		if card not in self.carpet:
+			raise ValueError()
+		suit, value = card
+		if self.foundations[suit] != value - 1:
+			raise ValueError()
+		self.count_move()
+		self.carpet.remove(card)
+		self.free_cells += 1
+		self.foundations[suit] = value;
+	def autodrop(self):
+		# This is independent for each suit.
+		for suit in Suit:
+			while (suit, self.foundations[suit]+1) in self.carpet:
+				self.drop_from_carpet((suit, self.foundations[suit]+1))
+	def drop_card_from_offer(self): # to the foundations
+		if len(self.offers) == 0:
+			raise ValueError()
+		offered_card = self.offers[-1]
+		suit, value = offered_card
+		if self.foundations[suit] != value - 1:
+			raise ValueError()
+		self.count_move()
+		self.offers.pop()
+		self.foundations[suit] = value
+		if len(self.offers) == 0 and len(self.deck) > 0:
+			self.count_move()
+			self.offers.append(self.deck.pop())
+	def flip_deck(self):
+		if len(self.deck) == 0:
+			raise ValueError()
+		self.count_move()
+		self.offers.append(self.deck.pop())
+	def get_card_from_deck(self):
+		if len(self.offers) == 0:
+			raise ValueError()
+		if self.free_cells < 1:
+			raise ValueError()
+		self.count_move()
+		self.carpet.add(self.offers.pop())
+		self.free_cells -= 1
+		if len(self.offers) == 0 and len(self.deck) > 0:
+			self.count_move()
+			self.offers.append(self.deck.pop())
+	def game_result(self): # None for not finished, True for win, False for fail
+		if all(self.foundations[suit] == 13 for suit in Suit):
+			return True
+		if self.can_move(): return None
+		return False
+	def print(self):
+		from pprint import pprint
+		# Print game state
+		print(f'Moves: {self.moves}\nFree cells: {self.free_cells}\nCards in deck: {len(self.deck)}\nAvailable card: {self.offers[-1] if len(self.offers) > 0 else "None"}')
+		print('Foundations:')
+		pprint(self.foundations)
+		print('Carpet:')
+		pprint(self.carpet)
+
+if __name__ == '__main__':
+	## A simple testing game:
+	from textwrap import dedent
+
+	game = Game()
+	game.print()
+	while game.game_result() is None:
+		q = input('pafdg? ')
+		try:
+			if q.startswith('p'):
+				game.print()
+			if q.startswith('a'):
+				game.autodrop()
+			if q.startswith('f'):
+				game.flip_deck()
+			if q.startswith('d'):
+				game.drop_card_from_offer()
+			if q.startswith('g'):
+				game.get_card_from_deck()
+			if q.startswith('?'):
+				print(dedent("""\
+					p: print state
+					a: autodrop carpet
+					f: flip deck
+					d: drop from offers
+					g: get from offers
+					?: this help.
+					"""))
+		except ValueError as e:
+			print(e)
+			print('Try again!')
+	print(f'Game ended in {game.moves}.')
+	if game.game_result():
+		print('You won!')
+	else:
+		print('You lost:')
+		game.print()
+