Chidwick Chops to Stay Alive

We get to the table and it appears that it was three-bet pre-flop and three players are involved including Konstantin Puchkov and Stephen Chidwick. The flop was dealt and it was . It is checked to Chidwick and he bets and is called by both players. The turn is the and it is again checked to Chidwick who puts in his last 3,500. The player in the small blind makes it 9,500 to go and Puchkov calls.

The river is the and the player in the small blind bets again. After thinking it over for about a minute, Puchkov lets his hands go and the hands are revealed: