organize qualifying zonal tournaments. Reunified title (since 2007) After the reunification of the FIDE and "classical" titles, the Chess World Cup and FIDE Grand Prix series were introduced as qualification for the Candidates Tournament. The Swiss-system FIDE Grand Swiss was introduced in the latter half of 2019, acting as another qualification path for the 2020 Candidates Tournament. See also Development of the Women's World Chess Championship Notes References FIDE World Championship events 1948-1990, Mark Weeks' chess pages World Championship events 1991-present, Mark Weeks' chess pages World Championships pages , Rybka Chess Community Forum World Chess Championships Recurring sporting events established in 1948