<prompt> Kalma do fuwunna dǝga tamotǝyin: Shiye 2015 South African Chess Championship lan kǝnasartǝ, kuru suro saa 1998, 2006, 2006 lan South African Chess Olympiad team lan bikkezǝyin.  <response>: 2008, 2012, 2016, kuru 2018. 