PokerStars Zoom, Hold'em No Limit - €0.10/€0.25 - 6 players
Replay this hand on Upswing Poker

UTG: €34.77 (139 bb)
MP (Hero): €26.29 (105 bb)
CO: €96.29 (385 bb)
BU: €52.88 (212 bb)
SB: €44.46 (178 bb)
BB: €28.78 (115 bb)

Pre-Flop: (€0.35) Hero is MP with 7♦ 7♣
1 fold, Hero raises to €0.62, CO 3-bets to €2.10, 3 players fold, Hero calls €1.48

Flop: (€4.55) K♦ 3♣ 2♦ (2 players)
Hero checks, CO bets €1.50, Hero calls €1.50

Turn: (€7.55) K♣ (2 players)
Hero checks, CO bets €4.10, Hero calls €4.10

River: (€15.75) T♦ (2 players)
Hero checks, CO checks

Total pot: €15.75 (Rake: €0.79)

Showdown:
CO shows A♠ A♦ (two pair, Aces and Kings)
(Equity - Pre-Flop: 81%, Flop: 92%, Turn: 95%, River: 100%)

MP (Hero) shows 7♦ 7♣ (two pair, Kings and Sevens)
(Equity - Pre-Flop: 19%, Flop: 8%, Turn: 5%, River: 0%)

CO wins €14.96

I hate these spots, i am not sure if fold or call on turn so i just play mixed strategy

Probably for this size on KxxK it's a call. If it's like TxxT, I might be more inclined to fold as he's likely to be betting like JJ/QQ again whereas on this kind of board he would not be doing so. His value range is pretty thin here KQ/AK and AA. I would fold if he bet like 70%+ I think.

I fold turn with this combo. Maybe fold flop too, 77 has to be close to the bottom of our range.

If you're folding flop here with 77 most villains are literally printing money bc they 3bet/cbet this kind of board at some super high frequency.

This is why you fold to the 3bet pre.
CO v MP 3bet crushes you so badly

Actually that's probably false unless you are calling 3bets out of position really wide. Our calling range is maybe 40 combos (39 if you use snowies ranges for these spots). Vs the 1/3 flop bet we need to fold around 12 combos, in practice a few more because we will under-realize our equity OOP. When we pick the combos we continue with, we want playablity and stable equity. Hands like AQ, AJ, and AT of clubs are probably better calls than 77 because they block some strong hands and have more outs to improve when behind. 77 is the worst made hand in my calling range, so I'm pretty happy letting it go along with some other ace high hands that don't have backdoor flushes.

Yeah idk if calling AQ/AJ/ATcc OOP in a 3bet pot is actually better. Playability is a lot less important in low spr spots. If you're folding all your baby pockets pre then maybe it can be okay, but don't forget that you will have many hands that just straight up brick and need to be folded. T9/JT/QJ/AQo etc. Either way this is a board people cbet super wide so I think it's a profitable call for this price.

77 is the worst made hand I see the flop with, but I'd peel one off with this combo as it has a diamond. Fold turn.
Kxx boards like this are stereotypically terrible for you as a caller of the 3-bet, so you can/should overfold.

Not sure why everyone is jumping to conclusions with the villain's range. As I said in other posts, without any real stats on your opponent we can't give you the optimal strategy here.

If he has a 3B% of 3% or less then you obviously fold pre or call with the intention of set mining. No set you fold flop but lean towards folding pre.

If he has a 3B% of 10% and if he's overly aggressive maybe you want to call his bets ATW.

You did fine if it's the latter but definitely made the wrong call on the turn if it's the former.

The reason he checked River was because of the King and the River Diamond. He was scared to bet in case you had it. A bluff on the river may have worked but without any real stats/info we can't give you the best strategy.

Edit: Now that I see his hand he obviously looks like a 3% 3Better. Stick with folding pre or if you're up to it call with the intention of set mining or bluffing OTR when he checks River on that type of board.