You will need to find each game piece and use it to complete the puzzle which will give you the coordinates of the bonus cache. Please don't remove the originals but take down the details or copy the game piece - ensure you record the shape, colour and any markings. Hopefully they'll also be stuck to the lid inside caches 2 to 6.
A useful grid and the puzzle board can be found on the page for the first cache. You may want to print these out before you start.
This is the second in the series and should be easy to find.
Please don't forget to leave the game piece in the cache and the cache in its original position.
Thanks.