re: Poker & $25 NLHE Full Ring: Semibluff turn holding A9s with loose image
4 handed to the flop I would consider checking and seeing if I can pick up a free card. Quite often this will check around.
Leading out 4 handed is a really strong line and you are only getting called by hands better than ours.
If one bets and the others fold you can check raise the flop. If one bets and there is a caller you will be getting around the right expressed odds
I want to hit the flush when there is money in the middle and players still in the hand .
As played the semibluff shove looks like the best way of winning the hand. I would have a quick glance at how often he goes to showdown to assist the decision. If he is a calling station you can probably check here. If he goes to showdown less than 25% the shove is probably best.