Defend QJs pre, check-raise the flop draw, and once we get jammed on, the price and equity make calling off the right play.
Flop comes 2c 2s 9c, giving us Q-high with a club draw on a paired, semi-wet board. BTN has the range edge, but we’re still in a close spot. Checking is the default here, and raising to 7.3BB is a reasonable semi-bluff that pressures one-pair hands and random floats while still keeping our line flexible.
After we raise to 7.3BB, BU rips for 30.3BB. We’re calling 25.9BB to win about 72.5BB, so we need roughly 26.4% equity. QJs has around 50% equity versus a strong but not nutted range, so calling off is the right decision. Jamming over the top would just isolate us against the very top of BTN’s range.