If you are able to checkmate your opponents with any pieces you will receive award for killer pawn, killer knight, killer bishop, killer rook, killer queen.
How to get the library card award
guys you all are overthinking it
i got the reading glasses one just by clicking on articles and returning to the articles page, and repeating.
i did the same for the library card one, just clicking on them and skipping the words
so its actually not as hard as you think!

If you are able to checkmate your opponents with any pieces you will receive award for killer pawn, killer knight, killer bishop, killer rook, killer queen.
oh not killer king too? how sad
You have get in the articles option when you click more you have to read 100 articles it
would take you a long but it could add your awards achievemens