Some 2.3 million of U.S. adults older than 65 — more than 4% — have a diagnosis of dementia. But even without a diagnosis, a certain amount of cognitive decline is normal as age sets in.

They were gathered around the kitchen table of their home, out among the farm fields between North Star and New Weston in Darke County.

This one is well reviewed, and it looked like a good game in our research ... and a pencil—to create devilishly competitive and brain-twisting battles. Here are five favorites.