Good morning dear friend, thanks for sharing with us. Let me try to help you.
The Preflop
Wow! Giving this huge sizing for the BTN, I would never be calling down with anything.
Very rare we are calling from the SB and we gotta have very specific reasons for so doing: BTN must be a donkey-whale and BB as well.
Even so I am not a great fan of calling a raise of 3.5x OOP: this polarization already means BTN is a weak player for itself.
Regulars are never opening this huge, no matter what at 100 NLHE.
the postflop
The Flop
Checking here seems fine. What is really fishy is BTN to be checking behind here, knowing that SB calls with a capped medium-weak range of hands, lol!
We could expect some 1/2 pot bet or 1/2 pot bet to make SB to fold all of its trashes, but checking on this specific flop is way too much.
One more thing: when BTN checks behind OTF, BTN cappes its range for weak hands and value hands that got scared of the ace OTF, so we are starting to bluff a lot of turns and rivers when our hand does improve.
The Turn
Our hand does improve and given the fact that BTN checked flop we can be stabbing it, because now our equity is very good to hit a Flush Nuts, trips or Two Pair. We also believe BTN would have betted all of its aces OTF, so there is nothing to be worried around.
BTN calls with what??? Strong value hands that do not feel secure enough to be raising, but once again, BTN cappes its range for certain groups of hands, because we believe Two Pair and Sets would be raising this turn on a very high frequency for protection, so we automatically exclude combos of A4, A7, AT (on which we are blocking the ace), 44, TT, 77, we don't see these hands calling huge bet OTT to give a free river for SB and be forced to be either leaving or jamming way behind.
So, BTN has no aces, no two pair, no sets, what the heck BTN is calling down?
The River
It comes a Queen and we know that BTN doesn't have AQ, because AQ would not be checking behind OTF. AA the same story. The only hand that could be a concern for us now is some QQ that it decided to check behind OTF because of the ace, even so, just a few lost combos.
BTN bets very small giving us odds to pay with all of our aces, when we do call from the SB preflop, we are paying 12 for a pot of almost 50, so if BTN displays some AQ, AJ or AK good for its slow play, but we believe that in general BTN (FISH) will be overplaying some strong value hand, because this is what all the fishes do.
We are never raising the river in situations like this, where we do flat from the SB a polarized sizing. If we do jam here BTN can easily fold all of its dominated hands and only pays us when we are nailed. The calling here seems optimal because we assume we are not winning any kind of spot, a 100% of times. Well played!
Regards;
Carlos 'Aballinamion' Barbosa