Quote Originally Posted by iopq
Quote Originally Posted by revolvingiris
Equity, or “chance to win.” For instance, if three people see the flop, each of the three hands will have some chance of winning. The sum of their chances to win is of course 100%.
your chance to win the hand is super irrelevant
for example, calling a raise with 22 against someone who you know holds KK+ because they are a super duper nit is EV+ despite you having 18% equity and needing ~30% to call
What spoon means by your chance to win is the likelihood that-- either because you win a showdown or because you get someone to fold-- you will actually take the pot down. And with respect to certain hands, your chance to win is less than your equity because often you will be forced to fold the hand to serious action even when you are ahead.

The best example of this in my mind is a small pocket pair like 33. In many situations where you are coinflip in terms of equity, your chance to win is actually less than that because you will have an underpair and won't be able to call any serious amount of action post-flop even just from players with overcards or draws.

The 43s that the original poster played from the blind is also an example of this. With 43s against a pre-flop raiser, if you flop 1 pair, you're often going to have no idea whether it is good or not. So you have to discount your equity somewhat for the chances that you will be forced to fold what was actually the best hand.