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The Expected Value (EV)

In the short and medium term, the luck factor influences the results.
It is interesting to minimize the luck factor whenever possible.
The Expected Value (EV) reduces it.

  • For all pots without showdown, luck is not measurable. The hand's EV equals the hand's Net gain.
  • For all pots with showdown before the river, the players' private cards are known, therefore their odds of winning.
    One considers that the hand stops and that the pot is split according to each player's odds of winning.

Example :

  • Player1 owns 26.png 24.png and 6 $ at the hand's beginning 
  • Player2 owns 25.png 38.png and 5,25 $ at the hand's beginning
  • The board is 22.png 20.png 27.png
  • Player1 is all-in and Player2 calls
  • The pot is 10 $. The rake is 0,50 $
  • Player1 has 44,1 % chance of winning, one considers he wins 4,41 $
  • Player2 has 55,9 % chance of winning, one considers he wins 5,59 $
  • In the end Player2 wins the hand :
    • Net of Player1 is -5,25 $ (0 $ won for 5,25 invested)
    • Net EV of Player1 is -0,84 (4,41 $ in theory won for 5,25 invested)
    • Net of Player2 is +4,75 (10 $ won for 5,25 invested)
    • Net EV of Player2 is +0,34 (5,59 $ in theory won for 5,25 invested)

A session's Net EV is the sum of its hands' Net EV.

The difference between Net and Net EV is called EV Diff, and reflects luck and bad luck.


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