Prizes in composition competitions
On September 20, 2016, Riebe won Third Prize at the Andrey Petrov Composition Competition (picture) in Saint Petersburg, Russia, with the orchestral piece Magma from 2015. The six selected finalist compositions were performed by St. Petersburg State Symphony Orchestra with conductor Arkady Steinlucht during a concert in St. Petersburg Grand Philharmonic Hall. A video recording made by Leonid Toropov is available on Youtube.
With his sinfonietta piece Geopoliticus Child, inspired by a Salvador Dalí painting, Riebe won the second prize at Uppsala Tonsättartävling (Uppsala Composition Competition) in March 2014.