$875 pot for a 579r flop. So I've got the double open ender. Checked round to Roy, who bets $350. UTG folds, I tank and call, krunch folds.
Turn 10 (now board has all 4 suits) $1575 pot, I have $2049 behind me (Roy has 4052). I check.. Roy bets $550. I flat.
River 4. I shove, he calls.
What did he have?
Spoiler:


