Note: This plugin is not affiliated with Poker Now (). For example, pot odds of "0.5" (or 50%) means that you need a better than 50% chance of making your hand in order to see positive expectation value from the hand. The odds are expressed as a fraction of 1.0. Once you've installed the extension, you'll see a small "Pot Odds" box appear at all times in the top right corner of the table. The calculation is based purely on the bet size and pot value – it has nothing to do with card values, hand odds, or your opponents playing style. This extension doesn't send any data off-site, nor does it look at your cards. You can use pot odds to help you decide whether to call, raise or fold, by comparing the pot odds to the odds of making your hand. Pot odds are often compared to the probability of winning a hand with a future card in order to estimate the call's expected value." "In poker, pot odds are the ratio of the current size of the pot to the cost of a contemplated call. "What are pot odds", you ask? From Wikipedia: This Chrome Extension adds a real-time pot odds calculator to your poker game on Poker Now, showing pot odds for every decision (yours and other players). UPDATE 4th Jan 2021: Fixed a bug whereby the pot odds were incorrectly calculated. You'll ideally need a fast hand evaluator, but that should be easy to find online if you don't want to write it yourself.This extension adds a pot odds widget to the Poker Now website. So on the turn (pre-river), it's even cheaper to compute the hand equities. Given the flop and turn, there's only 42 possible river cards. Given the flop, there's only choose(43, 2) = 903 boards possible by the end, so the flop probabilities (which you call the pre-turn), it's very cheap to enumerate all the runouts and compute the average equity for the three hands. This gives you preflop probabilities, and this is the most expensive thing to compute. (Or more accurately, compute the equity for each hand, since sometimes 2 or 3 hands will tie on the river). Enumerate all boards, and count how many times each hand wins on the river. That means there's choose(46, 5) = 1,370,754 different boards by the river. How to use our Poker Odds Calculator Select your variation of poker at the top of the calculator. Given 3 hands (6 cards), there's 46 cards remaining in the deck. For example, if you're considering preflop probabilities, you only care about the entire board by the river, and not the specific flop, turn and river. The trick is to disregard the order the cards come out as much as possible. The numbers are much smaller than you might expect, so brute-forcing is quite possible.
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