While searching on line, i see that the answer to the question seems to be yes. A 10 year US visitor's visa is sufficient for a Dominican citizen to fly to Chile and visit Chile.
However, when speaking to the Chilean embassy in NY City, they said it was not good enough.
The Chilean Embassy in the DR said it was good enough.
Both embassies are terrible about answering their phones. Nobody wants to work any more.
Has anyone actually done this?