i have the obvious calculations down (pair over pair = 80/20, flush draw by river = 3.5ish:1, bet size to take away draws, etc). its the "fancier" ones i dont take the time to calculate, but sometimes should...or just dont know how.

like...i have a flush draw w/ a gutshot (AsTs to a flop of Ks Js 8d), villain's range is 88+, QXs, 9To, etc)...how do i caluculate my EV, or FE?

or...i have overpair to low board (9s9d to 2d 6d 7s)... now how do i figure my percentages against villain's TT+ or OE draw (one i beat, the other i do not).

please nobody go nuts calculating these situations, as they are fictional and off the top of my head. meaning, if they did come up, they may not even be worth calculating at the time. just examples of difficult calcs to make in a 15-30 sec window.

thats the challenge...there are a few cases where a "pro" will come across some microscopically small edge that he finds through multiple calcs of FE, EV, odds, implied odds, etc. and, these guys crank off some wierd idea of whether they are ahead or behind, or if they should bet the "FE" or check/raise, check and hope to gain free card, or how to calculate their equity in the pot. again, this may be too much TV, but i am led to believe some "pros" are human calculators, and sometimes it would be nice to know when you need to stop and think "fancy math."

i seem to "go with my gut" a lot, and sometimes its right, and others its not. cant help but think "situational math" helps...

but when to use it?