SoniDwi was tied at 6-6 before Shon pulled clear, taking the next nine points and the first game.
The pattern was similar in the second game with the pair level at 6-6, but as SoniDwi's confidence grew he started to create problems for the Korean whose sloppy net play undermined his game.
SoniDwi went 13-6 ahead and let slip just three points before levelling the tie at one game all.