Best line on flop plo25

Posted 6 years, 6 months ago

Blinds: $0.10/$0.25 (4 Players) CO: $23.55
BN: $27.42
SB: $32.19 (Hero)
BB: $28.90

Preflop ($0.35) Hero is SB with A 6 A 3

CO raises to $0.75, BN folds, Hero raises to $2.50, BB folds, CO calls $1.75

Flop ($5.25) 3 6 K

Hero checks, CO bets $3.24, Hero raises to $14.71, CO raises to $21.05 and is all in, Hero calls $6.34

Turn ($47.35) 3 6 K Q

River ($47.35) 3 6 K Q 7

Final Pot CO wins and shows a straight, Three to Seven.
SB lost and shows two pairs, Sixes and Threes.
CO wins $45.35
Rake is $2.00

Do you agree that check raising is the best line. I don't like check calling due to bad visibility but is this spot better to just bet.