My aunt's dog was not a smart dog.

One year, we all went up to my grandparents' house for Christmas, and both dogs came along. The living room in the house was carpeted, and the kitchen had a tile floor, and there was a divider in the middle of the house so you could get into the living room from the kitchen from two different directions. Well, the dogs were playing and started chasing each other in circles, kitchen to living room to kitchen, etc. - until my mom's dog, Shorty, wised up. While my aunt's dog went skidding across the kitchen floor, Shorty would simply backtrack through the carpeted living room and be there waiting when the other dog finally made it off the tile - which of course meant the other dog would scrabble across the kitchen in the opposite direction, only to find out that once again Shorty had circled back to wait for him.

I don't think that poor dog ever figured out how Shorty had outmaneuvered him so badly.