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Scunning - the profitability of a bet is based on the size of the pot you are betting into.
First of all, we consider the pot to be free of ties to any player, regardless of prior bets. Poor or good play in the past, you are always betting to win the pot as it is now, and any bets are no longer yours.
Lets say we are betting into a pot of $100. If you are on the button and it is checked to you, many players will bet this pot regardless of their hand.
A pot sized bet (in this case, a bet of $100) will generally take down the pot as it nerfs the profitability of almost all drawing odds. However, if you are called down or if you fold to a reraise, you will lose your $100 bet
So, here, when you take the pot, you win $100, and when you lose your bet, you lose $100. So as long as you take the pot more than half the time, you are profiting with a pot sized bet.
The math on this is: 100 W - 100 L = $ Earned, so for $ to be positive, W > L
W = 1 - L
At 3/4 the pot, you nerf mostly the same drawing odds, so you take down the pot about the same amount of time, while investing less money in the pot your losing hands. In this case, you are taking a $100 pot, and losing $75 a loss, and you have to pick up 42% of pots to be profitable.
At 2/3, you only have to pick up 40% of those pots to be profitable, but your profits may decline as you may get called down a bit more.
At 1/2 and below, you get into flakey odds territory, where people with a low pair on a draw can call because they're getting odds, and you start to lose alot more of these pots so it becomes less profitable.
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