Villain was ridiculously tight. 7/2 through 57 hands.

PokerStars - $0.05 NL (6 max) - Holdem - 5 players
Hand converted by PokerTracker 4

UTG: $10.26
Hero (CO): $5.97
BTN: $24.31
SB: $2.89
BB: $5.40

SB posts SB $0.02, BB posts BB $0.05

Pre Flop: (pot: $0.07) Hero has K 6

fold, Hero raises to $0.15, fold, SB calls $0.13, fold

Flop: ($0.35, 2 players) 3 2 9
SB bets $0.10, Hero calls $0.10

Turn: ($0.55, 2 players) 9
SB bets $0.20, Hero raises to $0.55, SB calls $0.35

River: ($1.65, 2 players) 4
SB checks, Hero bets $1.00, fold

Hero wins $1.58

I figure with villain being so tight he might have an overpair although most likely he holds 2 big cards as he prob 3bets QQ+.

On the flop, I put him on a diamond FD and called just planning to take the pot away on the turn.

On the turn, when he bets pretty small again, I am pretty much convinced he is on a FD and seems as the perfect turn card fell for me I decided to rep the 9. When he calls I am obviously praying no diamond on river.

River looks clean to me and I decide to bet it again, as I would if I had the 9. Thankfully it worked.

Just wondered if this was a better timed bluff than some of my others or whether I just got lucky and it was dumb play?