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Craving - A New Ranking System
Published by Adam Lyttle on July 31, 2007

Comments
Soltiaire Craving, Sudoku Craving and Mahjong Craving have all had an upgrade to the ranking system. The new system has been designed to keep the game fair. Points are based on the time a game has been finished, the number of moves it was finished in and the average time taken by the community.

Each game you play is guaranteed to earn you an extra 100 points towards your score. The lower your time and the less moves you make, the more points you will receive. All of the points for each of the games are then added up, giving you your score and rank.

This is how the points are given:

(Average Best Times x 3) - Your Score + (Average Best Moves x 3) - Your Moves
If your score is less than 0 then your score = 0
Your score is then given an extra 100 points.

Example:

Lets say the average time taken for a game is 2:00
The average moves is 300
The time to beat is 6:00, while the moves to beat are 900

If you finished the game in 4:00 with 200 moves then your score would look like this:

(2:00 x 3) - 4:00 + (300 x 3) - 200 = ?
(120 x 3) - 240 + (300 x 3) - 200 = 820
820 + 100 = 920

So your points for the game would be 920

Interestingly, this also means that every time you finish a game with less time or moves you are actually changing the Average Best Times and Average Best Moves. So you are effectively increasing your own score and taking points off other peoples scores.

This article was posted in: News & Events


fizzbut commented on August 2, 2007

Adam, and interesting scoring system and one that seems to have met a quiet review. Meaning I guess all's well in Craving land. Thanks for you work. May I make a suggestion that I don't think will rock the boat since I don't think it's too radically different. But instead of calculating based on actual and average times and moves, how about basing it on the actual rankings for each game in time and moves subtracted from a multiple of the median of the # of players who attempt the game. You wouldn't have the same aspect of lowering the average with better times and moves but you would place equal weight on moves and time. This system gives a greater weight to time since there's a greater range between times then between moves. Plus I may be wrong but average moves is generally lower then average time.





Adam Lyttle commented on August 2, 2007

Interesting view on things Fizzbut, I will definitely take it into consideration.





Carole Del Vecchio commented on April 9, 2008

I don't agree with Fizzbut...many players admit to playing a game (before logging in) until they have their time below every one else's. Then they log in and are able to have a small time without thinking about the problem.





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