Notice that even though you have only a 33% chance to win the pot, the correct thing to do is actually to bet, despite knowing that you will probably not win that particular single hand: you will win about 1 in 3 such hands in the long run, minus the few percent of the time when someone beats your flush with a full house or quads or straight flush.

This ratio is 5:1 but the chance of making your flush is only 2 losses to 1 win, so on average in the long run you are making money from every extra bet from all 6 of you that goes into the pot. If you raise and the other 5 people in the pot decide to call your raise then you will be adding $5 to the pot whilst they will collectively be adding $25. However, calling is not necessarily the best play in this situation.

We already know that the flush draw will get there 1 time in every 3 (2 to 1) so making the call is +EV. Well, there is now $55 in the pot and it will cost you $5 to call so the pot is giving you 11:1 odds (i.e. The player in the small Blind bets $5 and there are four callers. Both Blinds call so there is $30 in the pot. Say you are playing 5-10 limit poker on the button, there are 3 limpers to you and you call with A4 diamonds. This is a complicated issue so it may be useful to elaborate with a specific example. A flopped flush draw will come in approximately 1 in 3 times by the river, thus in order for a call to be +EV the final pot must be larger than 3 times the call. In order to calculate the EV it is necessary to compare the size of the bet with the size of the pot. The person should only draw to that flush if to do so would be +EV. In Texas Holdem it is quite common for someone to flop 4 to a flush. Conversely if a bet or a call will, according to probability, likely result in less money being returned the action is said to be negative (-EV).Īn example may assist in the understanding of this concept. If a player can expect, given probability to make more money than he or she bets, the action is said to have a positive expectation (+EV). Expected Value (EV) is the average return on each dollar invested into a pot.

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