I've been looking at the FH draws for Omaha with paired boards. This applies to micro limit more than higher limits. Also Omaha offers much more opportunity to make FH's than Hold'em that these situations come up way more often.
I'd like someone like Baubid1 to talk about the math of these plays, I don't make any claim to be an "expert" so critical analysis of my thinking is welcome. Neither am I getting into the betting of these hands or the villain reads, anyone who wishes to discuss those topics is welcome.
Let's look at an example
You on BB with unraised board and 2 limpers
This is the "idiot" end FH (named after the idiot end of the straight): So you have the 4' full of 7's FH, but you are dominated so easily by a number of hands 7k, 7j, 74, KK, JJ, even 77. I've seen these type of hands crushed so often they almost seem worthless. So you raise after the turn and in turn are re-raised, I'm thinking 4 out of 5 times you are beat by K7 or KK. If the villan calls then he is either slow-playing or has another pocket over pair and wants to see the river. Yes he could
be bluffing, but in Omaha the half-way good players have made their hand, a really good or really stupid player may bluff.
"Safe" FH boards, the best FH hand is the one-of -each over card
Say Pocket KQ with a KKQ board, that's the nuts and there's no beating it (unless an A is on the board). Doesn't matter which cards just that they are the two highest. Notice the board has paired the KK not the QQ.
After that is the Over Pair: KK on a K88 board (with K being the High card). Still slight chance of loosing to pocket 8's but not worth worrying about, except tight passive who re-raises to your Pot sized bet (assuming the pot has grown significantly). He may have K8 or perhaps a set of overs in between K and 8. The problem with these really tight passives is that when they bet you take notice. I think you still have to call.
The next is the middle one of each: J9 on a JJ9 board with an over card or 2 (say A,Q). Now the FH's start to get a little tricky, The villan may have a nut straight or nut Flush and still think it's good so he's betting in. On the other hand he may have the higher FH or lower FH. These hands are often the most expensive mistakes, it allways seems when you are good they fold and when you are beat they raise, we remember our losses more.
After that switch the JJ9 board with a J99 board, then a decending order till you get to the idiot end. All these hands must be treated cautiously, it becomes important to limit the feild and isolate early when playing these. If you can't shove one villain out before turn with 2 villans post flop then you are in for heart ache.