The event has attracted 12 pianists from Japan, six each from the United States and France, and five from Poland.
There are also participants from South Korea, China, Italy, Canada, Mexico, South Africa, Israel and Lebanon.
A prizewinners concert is scheduled for September 14.
Sean Sutherland, a pianist representing St. Vincent and The Grenadines, won the previous Chopin Competition for Amateur Pianists in the Polish capital.
(mk/gs)
Click on the audio player above for a report by Radio Poland's Marcin Matuszewski.