Contract con_poker_hand_evaluator_v1
| Creator | ae9cfa894495930b8d2f1707ab936325b5c848ace677bb8ba41dfe7dcdb3e3e6 |
| Creation Hash | 593383a02142e503f2ce1d05cbb7116a1c26ec2769f36d6f026887cf53c458ea |
| Created On | 883 days ago - 12/14/2021, 8:04:04 PM UTC+0 |
Contract Code
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# con_poker_hand_evaluator_v1
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NUM_CARDS_IN_DECK = 52
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NUM_VALUES_IN_DECK = 13
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NUM_SUITS_IN_DECK = 4
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NUM_CARDS_IN_HAND = 5
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ACE_VALUE = 2 ** 13
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STRAIGHT_LOW_ACE_INDICATOR = int("10000000011110", 2)
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TEN_CARD_POSITION = 8
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RANK_BASE_VALUE = 10 ** 9
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RANK_ORDER = [
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'high_card',
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'pair',
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'two_pairs',
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'trips',
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'straight',
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'flush',
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'full_house',
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'quads',
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'straight_flush',
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'royal_flush',
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]
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DECK = [
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'2c', '3c', '4c', '5c', '6c', '7c', '8c', '9c', 'Tc', 'Jc', 'Qc', 'Kc', 'Ac',
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'2d', '3d', '4d', '5d', '6d', '7d', '8d', '9d', 'Td', 'Jd', 'Qd', 'Kd', 'Ad',
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'2h', '3h', '4h', '5h', '6h', '7h', '8h', '9h', 'Th', 'Jh', 'Qh', 'Kh', 'Ah',
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'2s', '3s', '4s', '5s', '6s', '7s', '8s', '9s', 'Ts', 'Js', 'Qs', 'Ks', 'As',
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]
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RANKS = {
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'2c': 13, '2d': 13, '2h': 13, '2s': 13,
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'3c': 12, '3d': 12, '3h': 12, '3s': 12,
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'4c': 11, '4d': 11, '4h': 11, '4s': 11,
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'5c': 10, '5d': 10, '5h': 10, '5s': 10,
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'6c': 9, '6d': 9, '6h': 9, '6s': 9,
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'7c': 8, '7d': 8, '7h': 8, '7s': 8,
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'8c': 7, '8d': 7, '8h': 7, '8s': 7,
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'9c': 6, '9d': 6, '9h': 6, '9s': 6,
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'Tc': 5, 'Td': 5, 'Th': 5, 'Ts': 5,
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'Jc': 4, 'Jd': 4, 'Jh': 4, 'Js': 4,
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'Qc': 3, 'Qd': 3, 'Qh': 3, 'Qs': 3,
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'Kc': 2, 'Kd': 2, 'Kh': 2, 'Ks': 2,
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'Ac': 1, 'Ad': 1, 'Ah': 1, 'As': 1,
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}
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# Python program to illustrate sum of two numbers.
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def reduce(function, iterable, initializer=None):
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value = initializer
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i = 0
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for element in iterable:
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value = function(value, element, i)
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i += 1
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return value
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def rank_value_fn(total, val, index):
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return total + \
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((val == 1 and (2**(index+1))) or 0) + \
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((val > 1 and (2**(index+1) * ACE_VALUE * val)) or 0)
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def evaluate_5_card_ints(hand: list) -> int:
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'''
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A: 8192
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K: 4096
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Q: 2048
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J: 1024
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T: 512
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9: 256
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8: 128
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7: 64
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6: 32
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5: 16
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4: 8
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3: 4
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2: 2
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A: 1
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10: Royal Flush
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9: Straight Flush
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8: Quads (4 of a kind)
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7: Full House
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6: Flush
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5: Straight
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4: Trips (3 of a kind)
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3: Two Pairs
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2: Pair
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1: High Card
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'''
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assert len(hand) == 5, 'Invalid number of cards.'
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suits = [0] * NUM_SUITS_IN_DECK
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values = [0] * NUM_VALUES_IN_DECK
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for card in hand:
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suits[card // NUM_VALUES_IN_DECK] += 1
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values[card % NUM_VALUES_IN_DECK] += 1
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rank_value = reduce(
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rank_value_fn,
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values,
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initializer=0
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)
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if 1 in values:
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first_card_index = values.index(1)
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else:
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first_card_index = -1
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is_straight = False
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if first_card_index >= 0:
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c = values[first_card_index:first_card_index+5]
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if rank_value == STRAIGHT_LOW_ACE_INDICATOR or \
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(len(c) == 5 and all([d == 1 for d in c])):
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is_straight = True
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n_pairs = values.count(2)
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is_trips = 3 in values
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ranks = {
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'royal_flush': False,
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'straight_flush': False,
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'quads': 4 in values,
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'full_house': is_trips and n_pairs == 1,
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'flush': NUM_CARDS_IN_HAND in suits,
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'straight': is_straight,
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'trips': is_trips,
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'two_pairs': n_pairs == 2,
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'pair': n_pairs == 1,
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'high_card': True,
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}
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ranks['straight_flush'] = ranks['flush'] and ranks['straight']
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ranks['royal_flush'] = ranks['straight_flush'] and first_card_index == TEN_CARD_POSITION
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rank_index = 0
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#rank_description = ""
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for r in range(len(RANK_ORDER)-1, -1, -1):
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rank = RANK_ORDER[r]
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if ranks[rank]:
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rank_index = r
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#rank_description = rank
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break
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rank_value += rank_index * RANK_BASE_VALUE - \
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((rank_value == STRAIGHT_LOW_ACE_INDICATOR and ACE_VALUE - 1) or 0)
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return rank_value
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def evaluate_7_card_ints(hand: list) -> int:
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best_rank = None
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assert len(hand) == 7, 'Invalid number of cards.'
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# 7 choose 5
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for i in range(7):
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for j in range(i+1, 7):
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new_hand = hand[0:i] + hand[i+1:j] + hand[j+1:]
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rank = evaluate_5_card_ints(new_hand)
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if best_rank is None or best_rank < rank:
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best_rank = rank
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return best_rank
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def evaluate_omaha(hole_cards: list, board: list) -> int:
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best_rank = None
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assert len(hole_cards) == 4, 'Invalid number of hole cards'
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assert len(board) == 5, 'Invalid number of board cards'
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n = 0
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for b in range(0, 4):
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for r in range(b+1, 5):
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for x in range(0, 3):
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for y in range(x+1, 4):
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new_hand = list(board)
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new_hand[b] = hole_cards[x]
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new_hand[r] = hole_cards[y]
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rank = evaluate_5_card_ints(new_hand)
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if best_rank is None or best_rank < rank:
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best_rank = rank
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n += 1
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return best_rank
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@export
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def evaluate(hand: list) -> int:
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if len(hand) == 1:
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# Simple lookup
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return 14 - RANKS[hand[0]]
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else:
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hand = [DECK.index(card) for card in hand]
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if len(hand) == 5:
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return evaluate_5_card_ints(hand)
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elif len(hand) == 7:
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return evaluate_7_card_ints(hand)
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elif len(hand) == 9:
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# Assume board is the last 5 cards
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return evaluate_omaha(hand[:4], hand[4:])
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else:
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assert False, 'Invalid number of cards specified: {}'.format(len(hand))
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Byte Code
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