Suit Strength Texas Holdem

3/21/2022admin

Suit Strength Texas Holdem Rating: 3,5/5 5835 votes

Poker hands from highest to lowest 1. Royal flush A, K, Q, J, 10, all the same suit. The strength of a flush is determined by the highest value card you hold in that suit, with an ace being the highest. If you hold A-Q diamonds and the flop comes 7-9-2 all diamonds, then you have an ace-high flush. After the flop, if you’re looking for one more card to.

Greenhorn

posted 8 years ago

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Can somebody suggest me a good algorithm to calculate

Hand Strength

for

Texas Holdem, Omaha

Poker games. Apart from this i am also

working on Pot creation and Rake calculation

part. It would be helpful if anyone could contribute some logic or algorithms.

Bartender

posted 8 years ago

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Kapish M Joshi wrote:Can somebody suggest me a good algorithm to calculate Hand Strength

No, because it isn't really an algorithm: it's an ordered list; and 10 seconds on Google got me this. If I was doing this, I'd probably consider using an Enum to define it though.

Apart from this i am also working on Pot creation and Rake calculation part. It would be helpful if anyone could contribute some logic or algorithms.

Again, the 'Pot' isn't really an algorithm; it's a structure - basically a List with methods for providing totals - and I reckon it's probably closely related to the Players at the table.
As for Rake calculation, you'll have to explain the term before I can help. Not a gambler.
Winston

'Leadership is nature's way of removing morons from the productive flow' - Dogbert
Articles by Winston can be found here

Greenhorn

posted 8 years ago

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Hi Winston,
Appreciate your help. Thanks. Yeah, http://www.pokerlistings.com/poker-hand-ranking this is actually the pattern that should be considered while calculating strength of cards.
For E.g. Consider simplest logic, If I am playing Poker Hand and
I got 5 cards as - 2♥ 7♦ 4 ♣ A♠ A♥,
Next person got 5 cards as - 5♥ 2♦ Q ♣ K♠ J♥,
here every card has a weight say 2♥- 23, 7♦ - 67, 4 ♣ - 98, A♠ - 122, A♥ - 109 then we have to create total and then compare both hands. The one with more weight wins the hand.
This is not really as simple as even i thought because there are millions of combinations possible with a hand (5 cards taken from a deck).
I am trying to implement this using pattern recognition, but that too is very lengthy.
Pot - yeah Pot is winning total at the end of poker hand, its not algorithm but we need to write some logic to calculate pot because:
1. Poker game can have number of Hands
2. Each Hand will add to the value of pot
3. Bets of each player will contribute to pot
4. Pot distribution depends upon the percentage of amount contributed by particular player to total pot amount
5. There can be one or more than one pot winners
I am done with the logic creation part for this.
Rake - Its the amount deducted from player whenever he bets some amount on table. It is the pivot of gambling where revenue generation happens. Can't disclose about it in details.

lowercase baba

posted 8 years ago

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Winston Gutkowski wrote:

Kapish M Joshi wrote:Can somebody suggest me a good algorithm to calculate Hand Strength

No, because it isn't really an algorithm: it's an ordered list
I don't that's what he's going for...
In standard Texas Hold 'Em, everyone is dealt two cards face down. there is a round of betting. You have to decide if to bet, and how much to bet, based on the two card. So being dealt a suited A-K is clearly going to be better than a non-suited 10-9. And an unsuited 2-7 is the worst possible starting hand.
But even at that...your position at the table also has an impact. If you are in an early position, you need a stronger hand if you are going to bet, whereas if you are on the button, you can bet with weaker hand - depending on what everyone else does.

There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors

lowercase baba

posted 8 years ago

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and 'Rake' isn't very complicated. It refers to how much money the house takes from each pot. It is generally only applied to casinos or on-line cash games. If you are playing at home with friends, there usually isn't one.
It can be done in any of several ways:
A fee to join the tournament
A percentage of each pot
A fee charged to the 'dealer' on each hand
Some online services charge a monthly fee (i.e. a subscription), but then play is 'free' beyond that
etc..

There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors

Bartender

posted 8 years ago

1
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Kapish M Joshi wrote:here every card has a weight say 2♥- 23, 7♦ - 67, 4 ♣ - 98, A♠ - 122, A♥ - 109 then we have to create total and then compare both hands. The one with more weight wins the hand.

Doesn't sound right to me.
First: the problem is complicated by the fact that you're choosing the 'best 5 of 7' (actually: Player's 2, plus the best 3-of-5 from the flop, turn and river).
Second: Any 'weighting' will only apply to:
(a) The value of card involved in making up two similar winning hands.
(b) The remaining cards of two identical winning hands.

I am trying to implement this using pattern recognition, but that too is very lengthy.

And possibly over-engineering. You only have 9 possible hands (10 if you count 'High Card', but personally I'd say that that's the absence of any other kind of hand) that fall into 3 categories:
1. Flushes - 5 cards of the same suit.
2. Straights - 5 cards in value sequence.
3. Multiples - 2, 3, or 4 cards of the same value (including full houses).

Online Texas Holdem

so I'd make those your first checks.
I'd also do them in the order above because in 'vanilla' form, that's the order they're ranked. And unless you're playing from a multi-deck shoe (unusual, from what a gather), it also eliminates the most possibilities:

Which Suit Is Highest In Texas Holdem

If you find a flush in the 7 possible cards, it must be the best hand available to the player. So, the only other thing you need to check is:
Are those same 5 cards (or a particular set, if there's more than one combination to choose from) ALSO a straight?

If you don't find a flush, but DO find a straight, again, it must be the best hand available to the player.

Computer Texas Holdem Free

If you don't find a flush, or a straight, the only other possible hand is a multiple (or twin-multiple) of some kind. I'll leave you to sort out that logic, but it's still relatively straightforward.

With a multi-deck shoe, it's a bit trickier, but still relatively straightforward. The main difference is that if you find a flush; the 7 cards could ALSO contain 4 of a kind or a full house.
HIH
Winston

'Leadership is nature's way of removing morons from the productive flow' - Dogbert
Articles by Winston can be found here

Bartender

posted 8 years ago

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fred rosenberger wrote:I don't that's what he's going for...

Oh, OK. I was thinking of weighting in terms of final evaluation. Seems to me that weighting (especially by card) probably isn't the way to go for evaluating a hand (or, more accurately, a 'situation'), since there are so many other variables - including the 'weight' that you might put on any previous bet placed, particularly if the game involves 'blinds'.
Winston

'Leadership is nature's way of removing morons from the productive flow' - Dogbert
Articles by Winston can be found here

Greenhorn

posted 8 years ago

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Thanks Winston. Actually the game being developed will go live for real money poker gaming; at early stage we are expecting around 1000 players playing online at the same time while approximately 200 just logged in and watching game. The knowledge you shared was really helpful.

Bartender

posted 8 years ago

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Kapish M Joshi wrote:Thanks Winston...The knowledge you shared was really helpful.

No probs. Too much late night TV. I've never actually played the game.
Winston

'Leadership is nature's way of removing morons from the productive flow' - Dogbert
Articles by Winston can be found here

Greenhorn

posted 8 years ago

1
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Winston is correct in that there is no real need to calculate hand strength until the very end of the hand where you are forced to determine the winner (showdown). For human players playing against other human players this will be sufficient as long as your program knows how to read the player's hands and evaluate them based on the list of hand rankings, flush beats straight for example.
If you're developing a poker playing artificial intelligence or if you're just curious you may want to look into starting hand strength from a strategic standpoint. As was pointed out, in texas holdem an ace and a king is a better starting hand than a two and a seven. One way to determine this is by running both hands through an equity simulator, which is a program that runs hundreds of thousands of different possible boards out that allows you to get a pretty accurate estimate as to which hand wins more often. Then you can run each hand against each other possible hand, determine an average equity and then rank the hands accordingly. There are two great free programs out there that do this already:
PokerStove
ProPokerTools
Its still however, ultimately a matter of strategy that determines what the best hands are and not programming since there are different betting streets and different player psychologies.
TwoPlusTwo is a great strategy site that also has a programming forum.

Greenhorn

posted 8 years ago

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I created somthing similar a while ago, it wasnt very nice coding.. but it was something fun to do.
ANyway have you looked at bill chen formula, that is very easy to convert into an algorithm. Il also try and find the site i used, it was a points scale basically, which would tell me whether i should raise or fold..etc..etc.. not sire if that what your lookign for.

Ranch Hand

Texas Holdem Poker

posted 8 years ago

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Here is complete code to compute strength of hand whick I learn from an online course.

import itertools def best_hand(hand): 'From a 7-card hand, return the best 5 card hand.' return max(itertools.combinations(hand, 5), key=hand_rank) def hand_rank(hand): 'Return a value indicating the ranking of a hand.' ranks = card_ranks(hand) if straight(ranks) and flush(hand): return (8, max(ranks)) elif kind(4, ranks):#four of a kind return (7, kind(4, ranks), kind(1, ranks)) elif kind(3, ranks) and kind(2, ranks):#full house return (6, kind(3, ranks), kind(2, ranks)) elif flush(hand):#all cards of same suit return (5, ranks) elif straight(ranks):#cards in sequence return (4, max(ranks)) elif kind(3, ranks):#3 cards of same rank return (3, kind(3, ranks), ranks) elif two_pair(ranks):#2 pairs of same rank return (2, two_pair(ranks), ranks) elif kind(2, ranks):#1 pair of same rank return (1, kind(2, ranks), ranks) else:#Nothing (High Card) return (0, ranks) def card_ranks(hand): 'Return a list of the ranks, sorted with higher first.' ranks = ['--23456789TJQKA'.index(r) for r, s in hand] ranks.sort(reverse=True) #to handle the (A-5) straight case return [5, 4, 3, 2, 1] if (ranks [14, 5, 4, 3, 2]) else ranks def flush(hand): 'Return True if all the cards have the same suit.' suits = [s for r, s in hand] return len(set(suits)) 1 def straight(ranks): ''Return True if the ordered ranks form a 5-card straight.'' return (max(ranks) - min(ranks) 4) and len(set(ranks)) 5 def kind(n, ranks): ''Return the first rank that this hand has exactly n-of-a-kind of. Return None if there is no n-of-a-kind in the hand.'' for r in ranks: if ranks.count(r) n: return r return None def two_pair(ranks): ''If there are two pair here, return the two ranks of the two pairs, else None.'' pair = kind(2, ranks) lowpair = kind(2, list(reversed(ranks))) if pair and lowpair != pair: return (pair, lowpair) else: return None def test_best_hand(): # S = Spade # D = Diamond # C = Club # H = Heart assert (sorted(best_hand('6C 7C 8C 9C TC 5C JS'.split())) ['6C', '7C', '8C', '9C', 'TC']) assert (sorted(best_hand('TD TC TH 7C 7D 8C 8S'.split())) ['8C', '8S', 'TC', 'TD', 'TH']) assert (sorted(best_hand('JD TC TH 7C 7D 7S 7H'.split())) ['7C', '7D', '7H', '7S', 'JD']) return 'test_best_hand passes' print test_best_hand()

Playing pocket Queen Jack Off suit and Queen Jack Suited in Texas Hold'em Poker.

Both QJ and QJs are playable hands in many situations in both limit Texas holdem and in no limit Texas holdem. However, they must be played with control and the understanding that they can be trap hands. Most of the profit from these hands will come from straights, flushes and two pair or better hands. These hands are very vulnerable when you just make a pair. It is often likely that one of your opponents may be holding an AQ, AJ, KQ or KJ, so if you hit just a pair and any of your opponents are showing too much aggression, it is best to get away from the hand.

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Early Position

I don't play either the QJ or QJs from early position in no limit Texas holdem, but I will occasionally play QJs in limit Texas holdem. Only when the table is passive and fairly loose, is this a good idea. If there are many raises before the flop, it probably isn't a good game to play QJs from early position in.

Middle Position

In limit holdem, you can play both QJ and QJs from middle position in most games if there hasn't been a raise from early position. I still fold them the majority of the time to a raise, but it does depend some on the playing style of the raiser. In most games, it is likely that you will have at least one caller behind you and then you will not have great position throughout the hand. You want to avoid being sandwiched between aggressive players with marginal hands like these.

I tend to fold QJ from middle position almost all of the time in no limit holdem, but if there has been no aggression from early position I may enter with a raise with QJs. When I do this, if I am re-raised from late position, I fold. Do not play these hands in no limit holdem from out of position against a raise. You are very vulnerable and can lose a large pot and can be forced into difficult decisions.

Late Position

Both the suited and non-suited hands can be played from late position, unless there has been aggression from one of the early or middle position players. If it has been folded around to you, you should enter the pot with a raise. QJ and QJs fair very well against two random hands in the blinds. You still must be careful with these hands in no limit Texas holdem, but you will have the advantage of acting last.

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