Overbetting the river? Advice appreciated.

Two hands from today's session. I overbet the river both in and out of position and got nothing. What could I have got away with?

Paradise Poker No-Limit Hold'em, $0.10 BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG+1 ($9.52)
UTG+2 ($20.77)
MP1 ($26.00)
Hero ($25.13)
MP3 ($12.70)
CO ($24.50)
Button ($17.30)
SB ($29.85)
BB ($17.45)
UTG ($71.87)

Preflop: Hero is MP2 with Qhttp://www.flopturnriver.com/phpBB2/...iles/heart.gif, Qhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif. SB posts a blind of $0.10.
UTG calls $0.25, 1 fold, UTG+2 calls $0.25, MP1 calls $0.25, Hero raises to $3, 4 folds, BB calls $2.75, UTG folds, UTG+2 folds, MP1 folds.

Flop: ($6.85) 8http://www.flopturnriver.com/phpBB2/...iles/spade.gif, 9http://www.flopturnriver.com/phpBB2/...miles/club.gif, 3http://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
BB bets $2, Hero calls $2.

Turn: ($10.85) Qhttp://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
BB bets $2.2, Hero calls $2.20.

River: ($15.25) 9http://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
BB bets $5, Hero raises to $15, BB folds.

Final Pot: $35.25

Paradise Poker No-Limit Hold'em, $0.10 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($22.60)
Hero ($30.90)
UTG ($14.15)
UTG+1 ($20.12)
MP1 ($25.55)
MP2 ($37.25)
MP3 ($38.30)
CO ($22.75)
Button ($39.15)

Preflop: Hero is BB with Jhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, Jhttp://www.flopturnriver.com/phpBB2/...es/diamond.gif. SB posts a blind of $0.10.
4 folds, MP3 calls $0.25, CO raises to $1, Button calls $1, 1 fold, Hero raises to $3.1, MP3 folds, CO calls $2.25, Button calls $2.25.

Flop: ($10.10) 3http://www.flopturnriver.com/phpBB2/...iles/spade.gif, Jhttp://www.flopturnriver.com/phpBB2/...miles/club.gif, 5http://www.flopturnriver.com/phpBB2/...iles/heart.gif (3 players)
Hero checks, CO checks, Button checks.

Turn: ($10.10) 2http://www.flopturnriver.com/phpBB2/...es/diamond.gif (3 players)
Hero bets $3, CO calls $3, Button folds.

River: ($16.10) 7http://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
Hero bets $15, CO folds.

Final Pot: $31.10

River lines:

First hand fine. wp. Maybe if you minbet he pushes, but probably not

Second hand isn't bad, but you might have gotten a call with 1/2 or 1/3 pot.

Neither of these are really overbets, they are value bets. Overbets are more than pot.

In both hands you are the preflop raises and you just check/call the flop. If you want to build the pot you must bet/raise the flop. Plus, if in either case the villian hit a better hand, he would have gotten great odds to do so.

Hand 1: I'd reraise the flop to 6 and try to get as much in on the turn as possible. As played, a min-raise on river might do it.

Hand 2: You tossed in a 2nd raise preflop that's usually QQ+/AK. That must warrant a c-bet in all cases especially when you actually have something. You could have tried $5-$7 flop, check turn (feigning a missed AK, and raising) and then a 2/3 pot bet on river.

hand 1: i like the line. villain knew he was beat and got the hell out of dodge. Maybe a min-raise works here on the river, but i think he folds either way.

hand 2: i think a bet in the $6-8 range gets called here.

Quote:

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In both hands you are the preflop raises and you just check/call the flop. If you want to build the pot you must bet/raise the flop.

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QFT, that makes it so you don't have to overbet the river.