Preflop and flop are marginal but defensible; the big leak is turning a no‑blocker, Q‑high hand into a massive river bluff in a 4‑bet pot on a four‑club board.
Flop 6d Ac Jc in a 4‑bet pot, pot ~67BB, SPR ~1.9, we check back as the in‑position caller and face a small 15.9BB bet. Our QdTd has a gutshot to the K and a backdoor diamond draw, but no club. CO’s 4‑bet range connects very hard with A‑high flops (AA/AK/AQ, some AJ, plus big club combos). With this structure and low SPR, IP is not supposed to lead; checking and letting CO c‑bet range is standard. No issue with the check.
Facing 15.9BB into 67BB, we’re getting ~4.2:1 and need only ~19% equity. QTs here has: 4 outs to a K for the nut straight (though Kc is partially dirty because it completes strong club hands), plus some backdoor diamond equity on the flop. Against a very ace‑heavy 4‑bet range our raw equity is not amazing, but the price is extremely good and we have position. The better bluff‑catch / float candidates are QcTc or KQ with a club, but QdTd still squeaks into a defend at some frequency purely on pot odds and playability. Calling is a bit loose but not a disaster, especially if CO can 4‑bet bluff and c‑bet wide.
Note: Calling flop with the non‑club QTs is slightly on the loose side in a very strong 4‑bet pot range vs range, though the price keeps it from being a major error.
Turn 7c brings a third club: board is 6d Ac Jc 7c, pot ~82.8BB, SPR ~1.0. CO checks. This card massively favors the preflop aggressor’s continuing range: Ax with a club, KQ/KTs/QTs with a club, and various big club combos all improve or retain strong equity. Our QdTd has Q‑high and a one‑card gutshot to K, but with three clubs out our straight outs are often not clean and we have zero club blocker. In solver terms, this combo is not a high‑quality bluff: effective bluffs here come from hands that block flushes (holding a club) or block Ax (like KQ with a club). Checking back and realizing what little equity we have is correct; trying to turn this into a big turn bluff would be punty.
River 9c makes the board 6d Ac Jc 7c 9c, four clubs on board, pot ~165.8BB, SPR ~0.5. We shove 83BB into 165.8BB after CO checks. In a 4‑bet pot, CO’s range is extremely rich in strong club holdings and Ax with a club: hands like KcKx, QcQx, AcKx, AcQx, and plenty of other Ax♣ and broadway‑club combos get here and are natural bluff‑catchers vs a jam. With QdTd we have zero showdown value but, critically, we also have terrible blockers: no club, no Ace blocker, no K blocker. We don’t reduce the density of CO’s flushes or Ax‑clubs at all, and we block some of the very bluffs we would want villain to have (like QTs without a club). This means when we shove, we’re targeting him folding very strong overpairs and Ax that simply shouldn’t fold in theory and won’t fold often in practice in a 4‑bet pot. The correct adjustment with this exact combo is to give up and accept that we picked a bad runout for our hand, not to punt into a range that’s structurally strong on this texture.
Note: Jamming river as a pure bluff with no club and no relevant blockers in a 4‑bet pot on a four‑club board is a huge over-bluff; this hand should just be checked down and surrendered.