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: Round 1 – 3 twomovers 20 minutes solving time Round 2 – 3 threemovers 60 minutes solving time Round 3 – 3 endgame studies 100 minutes solving time Round 4 – 3 helpmates 50 minutes solving time Round 5 – 3 moremovers 80 minutes solving time Round 6 – 3 selfmates 50 minutes solving time Sections Team Championship – To qualify as an official team world championship, there must be at least seven teams from seven countries present. This section has grown from nine teams in 1977 to now averaging 20. Individual – Likewise, for an official individual world championship to take place, 30 solvers from at least 10 countries must participate. This number too has grown from 18 in 1977 to well over 70 in the past six years (as of 2007). Women and Juniors (up to 23 years old) – This event only requires 10 solvers from at least seven countries. Rating Formulas For calculating ratings for players who previously did not have one, a provisional rating is given. This rating is given at the completion of the player's first tournament where the formula used is as follows: Provisional Rating = (Average Tournament Player's Rating) x (Player's Result / Average Result At Tournament) For players who have previously established a rating the following formula demonstrates how a new rating is achieved. New Rating = (Old Rating) + (KT) x (Player's Result - (Average Result x Old Rating / Average Tournament Old Rating)) KT = Tournament Coefficient (Ranging from 4 to 1 depending on strength of competition) Current rating list October 1st 2015, Top 10: GM Georgy Evseev (RUS) 2785 GM Kacper Piorun (POL) 2744 GM Piotr Murdzia (POL) 2742 GM John Nunn (GBR) 2716 GM Ram Soffer (ISR) 2667 GM Eddy