looking at this hand from all players perspectives.
flop..
hero checks: we know his hand
BB checks: no Q, no decent spade, probably no 9
UTG...same
CO...same, plus doesn't feel like taking a stab cause the pot is too small
turn:
hero,BB,UTG all check...no 9
CO, should he bluff here with any two?
Could some one be slowplaying the A,K or J,T of trump?
as hero BB or UTG, what spades should we be betting?
if someone bets, how big a trump does one need to call?
I think we can rule out someone having the A or K, as a flop bet should be placed.
so the line up of strength goes to J T 8 7 6 4 3...7 cards total.(I realize we know where the 7 is)
there are 8 cards in hands(2 have been folded) and 4 on the board.
what is the chance anyone holds a trump? 46 cards 7 trump (I am taking the AK out and leaving them in the undealt deck, they may come on river)
there is a 85% chance each card out is NOT a trump.
so each 2 card hand is 72% chance to NOT have a trump.
there is a 27% chance no one has a trump.
if we underweight the smaller trumps, 2 3 6 because they may not be in play and the also may not call a bet.
the CO should bluff IMO.
considering all this, I think we should SLOWPLAY our 7, with the idea of calling only the CO if he bets either the turn or the river. folding to anyone elses bet.
I dont think we should bet our 7 at any point, it loses when called.
I dont think the J or T should bet the turn from any position, slowplaying is better.
I do think CO should bet any two cards on the turn. because I dont think much can afford to call him.
this brings up the question, should UTG beat CO to the punch and bluff the turn first?
I did not do this perfect, but its close enough IMO.
you need to weigh, who will call with what. and someone who will not bet the A or K of trump on the flop, messes this all up...lol.
but I think correct is to slowplay and try and trap a bluffer, namely the CO, and I also think the CO should bluff.