Problem Collections are a way to make arbitrary groups of problems. These are used in a variety of ways, both public and private.
Exploring Collections
You can search the full list of public collections.
Create a Collection
Any user may create a new collection. Some notes on the fields:
- name -- pick a short and distinctive name
- description -- more detailed information about the collection. For now this is text, but will be rich text later.
- type -- pick the best overall type of the collection. This just helps people understand the broad purpose.
- privacy -- who can see your collection in any of the places collections are visible. "Public" means anyone can see. "Private" means only you. "Friends" is your friends on the site. This applies to the collections search page, but also the problem page, and any other place collections may be seen.
- collaboration -- who can add problems to this collection. "Problem Author" is the default, meaning whoever creates a problem can assign it to this collection. If "Private" then only the creator of the collection can add and remove problems. Note: site admins and editors can also assign collections to problems.
Adding Problems to a Collection
From any problem page, expand the drop down, then click the "Add to..." button. You will see this:
Favorites have been merged into this interface. (In the future they will just be Collections.)
Selecting the drop down shows you options of what collections you can add.
Removing Problems
In the same "Add to..." drop down, you can click the x next to a collection to remove this problem from it.
Collections on the Problem Page
They show up as a list of links:
Collection Tests
A fun way to test your knowledge of a collection is doing a collection test.
From any collection page hit the Test button:
(Note: associated leaderboard is the button next to it)
A collection test consists of 10 problems, all belonging to the collection. They start out at the easier end and get harder as you go along.
As you are doing the text, there's a status box on the right that looks a bit like this:
It shows which test you are doing and which problem you are on at the top. The next line down is the color to move and the difficulty of the problem. Below that are ten dots in a line. These indicate the result of each problem tried so far:
- Green means you got it.
- Blue means you got it with speed.
- Red means a miss.
After the test is complete you get a results screen. It shows you which problems you missed and you can click on them and investigate more if you want. There's also a leader board with your results and how they compare to everybody else.
Privacy settings for your test results are in user settings:
If you pass a test by getting all problems right, this will be marked as passed on the collection page with an icon:
