Annual chess puzzles competition
The World Chess Solving Championship (WCSC) is an annual competition in the solving of chess problems (also known as chess puzzles) organized by the World Federation for Chess Composition (WFCC), previously by FIDE via the Permanent Commission of the FIDE for Chess Compositions (PCCC).
The participants must solve a series of different types of chess problem in a set amount of time. Points are awarded for correct solutions in the least amount of time. The highest score at the end of the competition is proclaimed the winner.
Format.
The Tournament consists of six rounds over two days, with three rounds each day according to the following table:
Rating.
Formulas.
We assume that the tournament has n solvers, with ratings formula_1 (i = 1, ..., n) and in the tournament their scores are formula_2 (i = 1, ..., n). 
For players who didn't already have a rating, a preliminary rating is calculated. This rating is determined at the end of the first tournament in which the solver has participated. The formula that is used to calculate this rating is: 
For players who already have a rating, the new rating is calculated as follows. 
These formulas are the defaults. If parameters fall outside a predetermined range, correction calculations are being carried out. These can be found in the reference.
Rating list in 2015.
October 1st 2015, Top 10:
Rating list in 2023.
July 1st 2023, Top 10:
References.
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