On a website of our local sports competition I am planning to have a section, where you can compare the players scores. (Everyone attended the same 10 disciplines.)
The interface should be really simple: There will be a row with players photos, and you can just grab someone and drag him to the comparison area, and than drag second one (and another one you care about .. ) and they will be compared - which means the site will display theirs scores in a simple table and will highlight the best score for every discipline.
The problem is, that I would like to add functionality for comparison from various years of competition. For example if I wanted to compare my score from this year and my friends score from year 2012.
What are several ways to accomplish that?
I don't want more rows of photos, like one row for one year. I would like to keep the drag and drop system but I can't think out how to integrate the various years comparison in so when the user enters this section he would just get what to do and won't miss any feature.