Preflop and flop check are fine, but we should mostly call the flop bet with our draw; once we turn the straight, barreling big for stacks is exactly what we want.
Flop Td‑6c‑5s, SPR ≈ 18, this texture is good for BU but we hit a strong draw: open-ender with both 4 and 9 making a straight. Out of position and very deep, checking range is correct; we don’t want to start building a big pot with our entire range when villain has the initiative and a slight range advantage. With this specific combo, checking is mandatory – it’s a classic strong semi-bluff candidate that wants to realize equity and keep villain’s c‑betting range wide.
Facing 3.75 into 5.5, we’re getting great immediate odds with a high‑equity draw, and the solver wants this hand to mostly call and continue. Calling keeps BU’s range wide (all Tx, overpairs, 66/55, and a lot of air like KQ/QJ/98) while keeping our own range uncapped — we still have sets, two pairs, and strong draws. Raising with this exact combo is allowed at some frequency in theory, but those raises are typically larger, high‑pressure raises (around 1.3–1.4x pot) that really polarize us and start building a stack‑off tree. Our smaller raise to ~11.3BB mostly forces out the real garbage and isolates us versus Tx/overpairs/sets/strong draws without maximizing fold equity, which is a worse trade-off than just calling with good pot odds.
Turn 4d completes our straight on Td‑6c‑5s‑4d; at this point we effectively have the nuts and SPR is down to about 3. This is exactly the node where we want to start committing stacks with our strongest hands. Solver strategy for this combo is to bet aggressively, often using a big overbet or a solid medium/large sizing to set up river shoves. Our 24 into 28 (~85% pot) fits that plan well: we put heavy pressure on Tx/overpairs/sets and strong draws, while still leaving a comfortable shove size on the river if called (pot will be big enough that a river jam is natural). If anything, theory leans a bit more toward an overbet here, but the core idea – continue betting big for value and building a stack-off pot – is right on target.