The Holdem Calculator library calculates the probability that a certain Texas Hold'em hand will win. This probability is approximated by running a Monte Carlo method or calculated exactly by simulating the set of all possible hands. The Holdem Calculator also shows how likely each set of hole cards is to make a certain poker hand. The default Monte Carlo simulations are generally accurate to the nearest percent. Accuracy can be improved by increasing the number of simulations that are run, but this will result in a longer running time.
Command Line Options
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Usage
I've listed a few examples showing how to use the Holdem Calculator. Note that you can mix and match command line options to suit your needs. See the bottom example in this section to see how to use the multiprocess Holdem Calculator for faster computations.
Default use case:
Multiplayer use case:
Exact calculation:
Board supplied:
Input file supplied:
In order to calculate multiple hands in a single run, the user has the choice to allow Holdem Calculator to read from an input file. Each line of the input file should represent a single calculation. Hole cards and boards should be separated using a '|' divider.
Unknown Hole Cards:
Compute how likely a hand is to win against a random pair of hole cards. You can only specify one set of hole cards as unknown.Note: Performing calculations with unknown hole cards takes an excessively long time if community cards are not specified.
Multiprocess Holdem Calculator:
Takes the same command line options but utilizes multicore processors to increase the speed of computation.Windows users: Due to the process forking mechanism in Windows, parallel_holdem_calc might be slower than expected.
Library Calls:
If you want to use Holdem Calculator as a library, you can import holdem_calc or parallel_holdem_calc and call calculate(). The order of arguments to calculate() are as follows:
- Board: These are the community cards supplied to the calculation. This is in the form of a list of strings, with each string representing a card. If you do not want to specify community cards, you can set board to be None. Example: ['As', 'Ks', 'Jd']
- Exact: This is a boolean which is True if you want an exact calculation, and False if you want a Monte Carlo simulation.
- Number of Simulations: This is the number of iterations run in the Monte Carlo simulation. Note that this parameter is ignored if Exact is set to True. This number must be positive, even if Exact is set to true.
- Input File: The name of the input file you want Holdem Calculator to read from. Mark as None, if you do not wish to read from a file. If Input File is set, library calls will not return anything.
- Hole Cards: These are the hole cards for each of the players. This is in the form of a list of strings, with each string representing a card. Example: ['As', 'Ks', 'Jd', 'Td']
- Verbose: This is a boolean which is True if you want Holdem Calculator to print the results.
Calls to calculate() return a list of floats. The first element in the list corresponds to the probability that a tie takes place. Each element after that corresponds to the probability one of the hole cards the user provides wins the hand. These probabilities occur in the order in which you list them.
Copyright
Copyright (c) 2013 Kevin Tseng. See LICENSE for details.
Poker odds charts come in useful when you want to quickly work out the odds of winning a hand in Texas Hold'em. The most commonly used odds charts are the 'standard poker odds charts' below, which give both the percentage and ratio odds of completing your draw depending on the number of outs you have (see pot odds and drawing hands for more information).
The second set of odds charts highlight interesting odds for different situations in Texas Hold'em. These will help you get to grips with the different likelihood's and chances within the game of poker.
Standard poker odds charts.
Other poker odds charts.
Why use these odds charts?
There are currently many odds charts on the Internet at numerous poker websites. However many of these can be tricky to use. ThePokerBank provides easy to use charts highlighting the key draws on each, which makes them simple and effective to use during play.
I am confident that these odds charts are the easiest charts that you will ever use.
Texas Holdem Poker Hand Odds Calculator
How to use poker odds charts.
Poker odds charts help you to determine how much you can call when trying to complete a drawing hand, such as a flush or a straight draw. By comparing your pot odds with the odds of completing your draw, you can work out whether or not it will be profitable to call certain sized bets from your opponents.
Poker odds charts are most commonly used when working out pot odds.
It is perfectly possible to work out the odds of completing a draw in your head, but these odds charts make things much easier if you are looking for a quick reference or if you're just starting out. However, over time it is a good idea to learn the most common odds so that you no longer have to refer to any charts whilst you play.
Texas Holdem Hand Odds Calculator
Work out probabilities for yourself.
Don't just take my word for it or settle for the probabilities I've listed on the site, try working out probabilities for yourself. It's not as tricky or mathsy as you might think.
My guide on how to work out preflop hand probabilities gives a nice overview on basic starting hand probabilities. For flop probabilities and the likelihood of different combinations of cards on the flop, try the article on working out flop probabilities.
Go back to the handy Texas Hold'em tools.