This article depicts many of the strongest chess tournaments in history.
The following list is not intended to be an exhaustive or definitive record of tournament chess, but takes as its foundation the collective opinion of chess experts and journalists over the strongest tournaments in history.
Other factors were taken into account, but have less influence; for example the quality of chess played, the closeness of the contest and the number of world top 10 or 'big reputation' players who took part, and the time control (no fast chess tournaments are listed).
The names of the tournament winners have been included next to the year and venue.
No attempt is made at comparing the relative strengths of tournaments in the list, as this is, and continues to be, the subject of inconclusive debate amongst experts.