Folding a pocket pair to a tiny turn bet after the flop went check-check is a significant over-fold, even on flush-completing boards.
Flop Analysis
Checking back is the preferred play. While we have an equity advantage, our specific hand is an underpair that doesn't benefit much from betting into a range that contains many overpairs and top pairs.
**Ranges:** We have a nut advantage with sets like 88 and 77, but BB's 3-bet range is dense with overpairs like AA-JJ. Checking back keeps the pot manageable and allows us to realize equity.
**Board:** This texture is quite wet with the spade draw and straight possibilities, making it a dynamic board where checking back protects our range and prevents us from being blown off our equity by a check-raise.
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> **Takeaway:** With vulnerable underpairs in 3-bet pots, checking back flop preserves your equity and controls the pot size.
Turn Analysis
Folding here is a major mistake. The bet size is tiny, and after the flop went check-check, BB's range is heavily weighted toward air and weak semi-bluffs that we still beat.
**Math:** We are getting 4.2:1 on a call, meaning we only need about 19% equity to continue. With our pocket pair, we have over 37% equity against BB's betting range, making this a very profitable call.
**Ranges:** BB will bet many hands like AsKx or AsJx here as a semi-bluff now that the third spade has arrived. Since we checked back the flop, we have many marginal hands in our range that must defend to prevent BB from over-bluffing.
**Plan:** By calling, we reach the river in position. We can comfortably fold to large river barrels on most cards, but we must see a river given this extremely generous price.
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> **Takeaway:** Never fold a pocket pair to a 1/4 pot bet after the flop checks through; you are getting too good a price to give up.
Note: Folding to a 31% pot bet is a massive over-fold. You have more than enough equity to bluff-catch against BB's wide range of overcards and missed draws.