While our open-ended draw is strong, over-betting the flop and folding to a turn raise after picking up equity are significant mistakes.
Betting is fine, but this sizing is far too large. On a coordinated mid-range board, we should prefer a small geometric sizing to keep the BB's range wide and realize our equity cheaply.
Note: Over-betting the flop (130% pot) is unnecessary; a 33% sizing achieves the same goal of folding out air while losing less when raised.
Checking back is preferred to realize our equity, but if we bet, we must be prepared for the consequences. The 7c is a double-edged sword that improves our draw but hits the BB's calling range hard.
Folding here is a massive error. We have picked up an open-ended straight draw and the price offered by the BB is too good to pass up given our outs and the remaining stack depth. **Math:** We need roughly 34.5% equity to call. With 8 clean outs to the nuts (any J or 6), we have approximately 17% immediate equity to hit on the river, but we also have significant implied odds if we hit, as BB's raise represents a polarized range of straights or sets that will pay us off. **Ranges:** BB's check-raise on this turn includes 65s, T6s, and sets (88, 99, 77). However, they also have semi-bluffs like JTs or 54s. By folding, we surrender our share of a large pot when we are mathematically priced in to see the final card. --- > **Takeaway:** Never fold an open-ended straight draw when facing a raise if the pot odds and implied odds suggest you have the required equity to continue.
Note: Folding an OESD facing a raise is a major mistake; the pot odds and our 8 outs make this a mandatory continue.