Don't turn a weak high-card hand into a multi-street bluff against a range that wants to play for stacks.
Checking is the preferred play here. While we have the range advantage as the preflop raiser, this board hits the SB's flatting range (sets, 8x, and spade draws) very well.
Note: Betting here is a minor inaccuracy; checking back allows us to realize equity and protect our range on a board that favors the caller.
Folding is the only viable option. Once SB raises, they are representing a very strong range (sets like 66/33 or strong draws) and we have zero equity to continue with just Ace-high.
Note: Clicking back with Ace-high is a massive error. We have no draws and no made hand, while Villain's raise is extremely polarized toward value that won't fold.
Continuing this click-back war is essentially lighting money on fire. We are deep-stacked and SB is showing zero interest in folding to our aggression.
Note: Raising again with high card is purely spewy. We block nothing of Villain's value range and are forcing ourselves into a massive pot with no hand.
We have backed into second pair, but the pot is already bloated beyond repair. Shoving here is just a formality after the previous streets' errors. **Ranges:** SB's range is heavily weighted toward sets (88, 66, 33) and straights (75s) after the flop action. Our pair of fours is effectively a bluff-catcher that loses to almost everything SB calls with. **Board:** The 4c is a deceptive card; it gives us a pair but completes several straights (75, 52) that SB can easily hold given the preflop and flop action. **Math:** The SPR is so low (0.2) that we are priced in to see a showdown, but the strategic damage was done on the flop by building this pot with air. --- > **Takeaway:** When you have no made hand and no draw, do not try to win the pot by force against a range that is showing extreme strength.