Hi, Mary. I haven't played this game, but I was able to find this information about the chess puzzle:
In the hall, put the four chess pieces on the board. Arrange the chess pieces as seen on the TV screen. Please note: The arrangement of the game pieces might be different in your game.
You don't need to know anything about chess; you just need to replicate the pattern. I will try to find out whether or not you can skip this puzzle. Judging on what I am reading on the Big Fish forum about this puzzle, there were other folks that were having trouble figuring out what the chess pieces represented too.
If you haven't looked at it yet, the walkthrough is here.
I hope you can get some help with this.
EDIT: Hi, Ana!