How many pieces can you fit into a chess board?
The rules are:
- You can only have either knights, bishops, and rooks.
- The number of knights, bishops, and rooks must be equal.
- Each piece has to be attacked by one and only one other piece.
I was able to fit 8 of each:
![](http://physicspdf.com/wp-content/uploads/2017/12/Chess-3-1-300x300.png)
Can you do better?