# Pre-flop play in PLO 6max. Chapter 2. Entering the pot on preflop (CO)

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I continue to publish research in Omaha.

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###### CO

The CO position is fundamentally different from those considered previously.

Firstly, when drawing on the CO in most cases we are in position on the flop. The only risk of being out of position on the flop comes if the button enters the game. Compared with UTG and UTG +1 the mathematical risk of being out of position after the flop decreases respectively 3 and 2 times.

Secondly, if the button is sufficiently tight we are able to steal the blinds.

Third, the risk of running into AAxx, KKxx or other "lethal" hands from the CO is greatly reduced compared to earlier positions.

Recall that we previously computed the probability that one of our opponents at the table has a hand in the top 20% range:

UTG: 67%

UTG +1: 59%

CO: 49 %

D: 36 %

SB: 20 %

The difference in probability between the CO and the early positions is only 20 and 36 percent respectively.

Because of these differences , our preflop ranges will be greatly expanded. The difference between the ranges of playable in the CO and UTG +1 is noticeably greater than the difference between those played UTG and UTG +1. If the hand ranges from the early positions differed from each other by not more than 25-30% , the range of hands playable from the CO may well be one and a half times wider than the range of hands when UTG +1.

The nature of the game from the CO strongly depends on the player on the button, his VPIP, as well as the opponents VPIP.  Of these, the button’s characteristics are more important because they determine not only the probability of seeing the flop, but whether will we be in a position or not.

Let us calculate how often and under what circumstances we find ourselves post-flop depending on the VPIP of our opponent on the button.  We shall assume that the blinds have an average VPIP of 25 (very tight tables) and 35 (loose tables). Percentages are rounded to whole numbers.

Seeing flop %, in position %, Without position %

BTN, VPIP = 20 55 % 35 % 20%

BTN, VPIP = 25 58% 33% 25%

BTN, VPIP = 30 61 % 31 % 30%

BTN, VPIP = 35 63 % 28 % 35%

BTN, VPIP = 40 66 % 26 % 40%

BTN, VPIP = 45 69 % 24 % 45%

BTN, VPIP = 50 72 % 22 % 50%

Seeing flop % in position % Without position %

BTN, VPIP = 20 66 % 46 % 20%

BTN, VPIP = 25 68% 43% 25 %

BTN, VPIP = 30 70 % 40 % 30%

BTN, VPIP = 35 73 % 38 % 35%

BTN, VPIP = 40 75 % 35 % 40%

BTN, VPIP = 45 77 % 32 % 45%

BTN, VPIP = 50 79 % 29 % 50%

As can be seen from the tables, as the button becomes looser, we not only play fewer hands with our without position on the flop, but there is also a reduction the absolute number of hands played in the position . It decreases as the button’s preflop range increases.

Therefore, I recommend great caution when playing at tables, where a very loose opponent is seated just after us, as his game can completely break us preflop in the CO. The exceptions to this are fish, who love to see the flop and then passively draw and fold their hand on the turn or river.

Thus, we consider two cases.

Case #1: The button is a loose opponent.

Much of the time we get a call in response to our raise. As a general rule, with a raise and a call, one of the blinds will come into the hand- more often that when the CO/BTN dynamic is raise/fold.   As a result, we often see the flop in a multiway pot, sandwiched between two opponents . Make it worth with a hand that is highly likely to be improved on the flop and will be easy to draw. These hands are all possible rows , rows with a couple good series with denglerom etc. - Preferably with as many as possible mastevyh matches. Due to these hands and should expand its range preflop.

Case #2: On the button - tight opponent.

In this case, we will have more opportunities to see the flop in position more often and to play HU (see table above) . This gives us the opportunity not only to expand the range of "drawing " hands, but also add some hands that are difficult to draw to in a multiway pot , but have a good pre-flop odds against wide range of hands. These hands , for example, include two ladies, dry hands with a king and an ace pair of jacks with a king or an ace, etc.

Now consider the possible reaction from the opponent whom we have reraised . Since the flop will be for a 3bet pot, the game will be more aggressive and the value of position will increase even more. This means that the response to a re-raise from the button and blinds will be much lower than their own 3bet range.

If the button 3bets into us, we will be much less inclined to call and play with hands of average quality (eg unsuited rundowns series with two gaps) than if the blind reraised.

Next article:

Chapter 2 (D & SB)