The Canadian Open Chess Championship is Canada's Open chess championship, first held in 1956, and held annually since 1973, usually in mid-summer. It is organized by the Chess Federation of Canada. The event celebrated its 50th rendition in 2013.
It was organized every two years from 1956 until 1970. The tournament rotates around the country, and has been held in seven of Canada's ten provinces during its 60-year history. The format has usually been a Swiss system with nine or ten rounds, usually over a nine-day period. It is open to all players who wish to enter, from Grandmasters to beginners.
The Championship's list of winners has included some of the world's strongest players, including Grandmasters Boris Spassky (in 1971, while he was World chess champion), Bent Larsen, Alexei Shirov, Vassily Ivanchuk, Viktor Bologan, Artur Yusupov, Bu Xiangzhi, Alexander Moiseenko, Kevin Spraggett, Ljubomir Ljubojević, Larry Evans, Pal Benko, William Lombardy, Gyula Sax, Igor Vasilyevich Ivanov, Walter Browne, Tony Miles, Larry Christiansen, Joel Benjamin, Eduardas Rozentalis, Vladimir Tukmakov, Jonathan Rowson, Luke McShane, Vladimir Epishin, Vladimir Malaniuk, Pentala Harikrishna, Alexander Shabalov, Nigel Short, Eric Hansen, and many other top stars.