Definition of strong tournaments

Strong tournaments are defined as tournaments where the field includes at least two players who have been in the top 10 at some point over the past year. Also included will be tournaments which do not fulfill the above requirements, but involve another player winning a tournament which features the reigning World Champion. 

These include any tournament which is played partly or wholly with classical chess, these are primarily classical round robins but also include knockout tournaments, Swisses and hybrid tournaments. 

Rankings are based on Chessmetrics before July 1971 and official FIDE rankings from July 1971 onwards. Edo Historical Ratings are also used as reference. 

In cases where players share first place in a tournament:

i) The winner of a playoff is deemed to be the sole winner.

ii) If the winner is determined by a numerical tiebreak, e.g. Sonneborn-Berger, number of wins etc, it will be deemed a shared victory by every player who shares first. The exception is when a qualifying place is determined by the sole winner, such as for Candidates Tournaments. 

*The idea for the requirement to have at least two players who have been in the top 10 recently, came from the user Kinghunt at Chessgames.com