Quote:
Originally Posted by Garick
Any fans of the "down bet" (a c-bet that is smaller than our PF open was) care to explain the theory behind it? I don't get it at all.
I know this is an old post, but thought I would chime in for anyone reading it later. This type of bet generally happens when the following situation occurs:
- We have a range advantage throughout the ranges
- We have lots of marginal hands in our range
- We can get hands with equity to fold with our marginal hands
Classic example is K72r BTN vs BB. Both ranges are extremely wide with lots of trash, but BTN's range has an advantage at the very top (KK) and the way down to the bottom. The bulk of our advantage comes from hands like 88-QQ that the opponent would have 3 bet preflop (this changes in low stakes live games, but we will get to that).
You can see here that the green line (BTN) has a big equity advantage from around the 80-70% mark and this is from these types of underpairs on this board.
If we have a hand like 99 and we bet small and get a hand with lots of equity, like QTo to fold, that is a win. If we doesn't win, we have at least denied him the equity of seeing a free turn card.
When we have a lot of marginal hands in our range, like these underpairs, it doesn't make sense to size up, because we isolate ourselves vs the nutted part of villain's range. It also sucks to check back a hand like 99 that is vulnerable and hates nearly every turn card, so betting to deny equity makes a lot of sense.
The main line on these boards is to bet our entire range small on the flop and really polarize most turn cards by playing an overbet or check strategy. We check some hands like weak top pairs and underpairs, along with a lot of trash. We overbet our best hands, even as weak as something like KT at some frequency. Depending on the runout, we sometimes keep polarizing our bet value hands by jamming river or we size down some with our hands that are still beating most of villain's range, but aren't the nuts.
That's the theory, now let's get to practice. In practice, especially at low stakes live games where no one knows what we are doing, we can size up with our value and bet smaller with our marginal hands and bluffs. Villains don't XR enough, so we need to bet bigger with our made hands that don't block villain's continues, like AA and some bottom sets. When we have a marginal hand or a bluff and we bet small, we get to overbet lots of turn cards and put villains in a tough spot, since they started with a very wide range and likely didn't fold much of it to the small bet.
Also, the equity advantages change quite a bit when villains don't 3b enough, but at the same time, they are probably calling way too wide preflop, so this increases our equity advantage, so they sort of cancel each other out.