Participating in harder games would help a lot better. It makes the brain actively involved especially because it would be more challenging than something a person usually plays. There are brain training games that require recognizing numbers and focusing on the descriptive aspects of the game. Continuing playing a regular game does not do a great impact to the brain as it would when doing something demanding. Even playing with friend reduces the risk of Alzheimer’s. The most important thing is that you keep challenging the brain and keeping it active.