One of many caches placed for the 2016 Yolo Geo Rally (GC6HX7N) held on Oct. 1, 2016.
Your mission, should you choose to complete it, is to locate the "prime" location(s) where you might be able to remove a dowel (or 2) in order to unclock the door and slide the cache out. This is all done by sliding blocks around on the game board. Please be gentle and be sure to replace as found.