A river bluff :

[spoohunter]

I understand this wouldn't work against second level thinkers. I raised preflop, what hand could I have with a 4 in it. I could have a big pocket pair, but if they realized I was TA they would know I would never play an overpair like this. In fact, to an observant opponent, my hand had to be relatively obvious.

I think the flop and turn play are automatic : what do you think of the river?

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

MP2 ($3.75)
MP3 ($11.35)
CO ($7.10)
Hero ($15.55)
SB ($8.60)
BB ($9.85)
UTG ($3.80)
UTG+1 ($5.10)
MP1 ($7.80)

Preflop: Hero is Button with K/images/graemlins/diamond.gif, A/images/graemlins/diamond.gif.
UTG calls $0.10, UTG+1 calls $0.10, <font color="#666666">1 fold</font>, MP2 calls $0.10, MP3 calls $0.10, CO calls $0.10, <font color="#CC3333">Hero raises to $0.7</font>, <font color="#666666">2 folds</font>, UTG folds, UTG+1 calls $0.60, MP2 folds, MP3 calls $0.60, CO calls $0.60.

Flop: ($3.15) 3/images/graemlins/heart.gif, 2/images/graemlins/spade.gif, T/images/graemlins/diamond.gif <font color="#0000FF">(4 players)</font>
UTG+1 checks, MP3 checks, <font color="#CC3333">CO bets $0.5</font>, Hero calls $0.50, UTG+1 calls $0.50, MP3 folds.

Turn: ($4.65) 5/images/graemlins/diamond.gif <font color="#0000FF">(3 players)</font>
UTG+1 checks, <font color="#CC3333">CO bets $0.5</font>, Hero calls $0.50, UTG+1 calls $0.50.

River: ($6.15) 6/images/graemlins/heart.gif <font color="#0000FF">(3 players)</font>
UTG+1 checks, <font color="#CC3333">CO bets $0.4</font>, <font color="#CC3333">Hero raises to $4</font>,

Final Pot: $10.55

[gulebjorn]

I'm not sure you should call the flop bet. OK, it's only a 5$ bet into a 3.25$ flop, so you're getting 7-1 pot odds, but the only hands i think he is likely to have would be AT or a PP. So if an Ace comes up, it could very well give him two pair. So the only safe card for you is a K, assuming he didn't call your raise with KT. The backdoor flush draw also doesn't add much to your odds. Anyway, if you have any implied odds at all, and a good read if an A or K comes up, so you know he didn't make his two pair, the call is probably fine.
The river bluff... the straight possibilities do look scary enough to try a bluff... His slowing down on the betting looks pretty weak... But like you said, why would he believe you have a 4?
I think a pot size flop-reraise would be a better bluffing opportunity.

I'm not an expert at this game, so please correct my thinking if i'm wrong.

Good luck.

[DoomSlice]

There are any number of places where a bluff would be appropriate IF weak betting for this player means weak holdings. He really is just screaming to get this pot stolen from him.