Flop Analysis
With second pair in a 4-bet pot and SPR ~1.2, we should mostly check and allow CO to bet or check back, rather than potting/jamming into their very strong, in-position range. **Ranges:** CO’s flat vs 4-bet range is dense with strong Kx (AK, KQ), overpairs (QQ+), and strong diamond draws, while our range has more bluffs and hands like QQ–TT; second pair here functions closer to a bluff-catcher than a value hand. **Board:** The K-high, two-diamond texture favors IP: top pair improves a lot of their continues, and they have many strong draws, so our equity share and nutted hand density are both lower than theirs. **Plan:** Checking lets us see how CO splits bets between value and bluffs; we can then call off versus reasonable sizing with this strength, but by leading big we isolate ourselves vs a calling range that is heavily weighted to top pair+ and big draws. --- > **Takeaway:** In 4-bet pots on K-high, drawy boards, second pair out of position should mostly check and bluff-catch rather than force a stack-off.
Note: The large flop stab with second pair into a range-advantaged in-position caller is too aggressive; checking is much higher EV and avoids jamming into a value-heavy calling range.