Hero flopped second pair, turned trips, and extracted value across three streets — a well-played hand overall. The main issue is the river bet sizing, which left significant value on the table.
Street-by-Street Analysis
Preflop (5/10)
A9o from UTG+1 is a marginal open at a full table — it's near the bottom of a standard raising range for this position, especially 500BB deep where being out of position with a dominated ace can get expensive. The iso-raise over UTG's limp is fine in concept but the hand selection is loose.
Flop (7/10)
Second pair with an ace kicker on K♦9♣7♠ warrants a small c-bet into two opponents. The ~0.4x pot sizing is appropriate — you want to charge draws (T8, 86) and worse pairs while keeping the pot manageable when you're behind Kx. Solid.
Turn (9/10)
The 9♥ gives you trips, and your ~0.8x pot bet is excellent. You're out of position against two callers who likely hold Kx hands, pocket pairs, or draws. This sizing builds the pot effectively while still getting called by worse. Both opponents calling confirms they have something worth continuing with.
River (6/10)
Trips on K♦9♣7♠9♥6♥ is very strong — only 50 of 990 possible holdings beat you. The 6♥ completes 8-T and 5-8 straights (32 combos total) but those are a small fraction of what calls. Your $175 bet into $463 (~0.4x pot) is too thin. UTG limped pre and called two streets — they likely hold Kx or a pocket pair and would call a much larger bet. A sizing of $275-$350 (~0.6-0.75x pot) extracts far more from the Kx hands that are never folding here.