Puzzles and Brain Health: Do Crosswords, Sudoku and Games Keep Your Mind Sharp?
What research says about crosswords, sudoku, jigsaw puzzles, chess and board games for brain health and dementia risk, why novelty and challenge matter, the social benefits of games and how to build a brain-healthy puzzle habit.
Every morning, coffee in hand, you tackle the crossword. Or maybe it's the daily word game everyone shares in the group chat, a sudoku on the train, a 1,000-piece jigsaw on the dining table or a weekly chess match with a friend. It's fun, it's satisfying and somewhere in the back of your mind you're hoping it's also keeping your brain young.
Is it? Puzzles and games have become a hugely popular part of daily life, especially since daily word puzzles went viral. Research suggests they can be part of a brain-healthy lifestyle, but the full picture is more interesting than "do a crossword, prevent dementia." Here's what we know.
What the research says about puzzles and brain health
Puzzle-doers tend to have sharper minds
In 2019, researchers at the University of Exeter and King's College London analyzed data from more than 19,000 adults aged 50 and older in the PROTECT study. They found that people who regularly did word and number puzzles, like crosswords and sudoku, tended to perform better on tests of attention, reasoning and memory. The more often people did puzzles, the better they tended to score.
But correlation isn't causation
Here's the catch. Studies like this show a link, not proof. It's possible that people with sharper minds simply enjoy puzzles more, rather than puzzles making minds sharper. Researchers have been careful to note this.
Mental activity and dementia risk
Several large, long-term studies have found that people who engage in mentally stimulating activities, like reading, puzzles, board games and learning, have a lower risk of dementia. A study of older adults in Australia published in 2023 in JAMA Network Open found that activities like doing puzzles, playing games, writing and taking classes were associated with a lower risk of dementia.
Again, these are associations. But together with other research on cognitive reserve, they suggest staying mentally active is worthwhile.
Cognitive reserve
Scientists use the term cognitive reserve to describe the brain's resilience, its ability to keep functioning well despite age-related changes or damage. Education, mentally challenging work, social connection and lifelong learning seem to build cognitive reserve. Puzzles and games may contribute, especially when they're challenging and varied.
Why novelty and challenge matter
Doing the same easy puzzle every day can become automatic. Once a task is easy, your brain doesn't have to work as hard. To get the most mental benefit:
- Increase difficulty as you improve
- Try different types of puzzles that use different skills
- Learn new games with new rules and strategies
Our guide to neuroplasticity explained explains why new challenges help your brain adapt.
Types of puzzles and what they challenge
| Puzzle or game | Skills it challenges |
|---|---|
| Crosswords | Vocabulary, memory, word retrieval |
| Sudoku | Logic, pattern recognition, working memory |
| Jigsaw puzzles | Visual perception, spatial reasoning, patience |
| Word games (like daily word puzzles) | Vocabulary, deduction |
| Chess | Planning, strategy, memory, problem-solving |
| Card games (like bridge) | Memory, strategy, social skills |
| Logic puzzles | Reasoning, deduction |
| Strategy board games | Planning, decision-making, social interaction |
| Escape rooms | Teamwork, problem-solving, creative thinking |
A mix of these can challenge your brain in different ways.
The social side of games
Some of the biggest benefits of games may come from playing with other people. Social connection is strongly linked to brain health and overall wellbeing. Board game nights, card clubs, chess groups and trivia nights combine mental challenge with friendship, conversation and laughter. Our guide to loneliness and health explains why connection matters so much.
If you play mostly alone, consider adding a social game to your week. Many libraries, community centers and cafés host game nights. Our guide to third places has ideas for finding these community spaces.
Puzzles for stress relief
Puzzles can also be relaxing. Jigsaw puzzles in particular are often described as calming and meditative. Focusing on a puzzle can draw your attention away from worries, a bit like mindfulness. Some people find puzzles a great way to wind down in the evening instead of scrolling. A challenging puzzle can even bring on a state of flow.
What puzzles can't do alone
Puzzles are a great habit, but they're one piece of a bigger picture. The 2024 Lancet Commission on dementia prevention identified 14 modifiable risk factors, including physical inactivity, high blood pressure, hearing loss, smoking, depression, social isolation and less education. Addressing these may make a bigger difference to brain health than any single activity.
For the best brain health, combine puzzles with:
- Regular physical exercise. See our guide to exercise and the brain.
- Social connection
- Good sleep
- Heart-healthy habits, like managing blood pressure
- Learning new skills, like a language or instrument. See our guides to learning a language as an adult and learning an instrument as an adult.
- Protecting your hearing and vision
Our guide to do brain training apps work also explores what research says about digital brain games.
How to build a brain-healthy puzzle habit
1. Start with what you enjoy
You'll stick with puzzles you actually like. If crosswords bore you, try logic puzzles or chess.
2. Make it a daily ritual
Pair puzzles with an existing habit, like your morning coffee or evening tea.
3. Level up
When a puzzle becomes easy, move to a harder level or try a new type.
4. Mix it up
Rotate between word, number, visual and strategy puzzles throughout the week.
5. Play with others
Schedule a weekly game night, join a club or play online with friends and family.
6. Keep it fun
Don't turn puzzles into a chore or a test. Enjoyment is part of the benefit.
7. Balance screen and paper
Digital puzzles are convenient, but paper puzzles and physical games give your eyes a break from screens. If you play on your phone, watch out for apps that pull you into endless scrolling or in-app purchases.
A sample weekly brain-game plan
- Monday: Daily crossword
- Tuesday: Sudoku or logic puzzle
- Wednesday: Chess, online or with a friend
- Thursday: Jigsaw puzzle for 30 minutes
- Friday: Game night with friends or family
- Weekend: Try a new game or puzzle type
Puzzles across the lifespan
Puzzles aren't just for retirees. They can be valuable at every age:
- Kids: Jigsaw puzzles, matching games and simple logic puzzles help build problem-solving, patience and fine motor skills. Board games teach turn-taking, counting and handling losing gracefully.
- Teens and young adults: Strategy games, escape rooms and logic puzzles offer a screen-light alternative to scrolling and a fun way to connect with friends.
- Busy adults: A 10-minute puzzle can be a refreshing mental break during a hectic day, a bit like a microbreak for your brain.
- Older adults: Puzzles and games can keep the mind engaged, and social game groups offer connection and routine.
Puzzles are also a lovely way for different generations to spend time together. A jigsaw on the dining table invites anyone who walks past to add a piece, and card games are often passed down through families. Those shared moments may matter as much for wellbeing as the mental workout itself.
When puzzles become frustrating
If you find yourself getting stressed or frustrated, take a break, lower the difficulty or switch puzzle types. The goal is a challenge that feels satisfying, not punishing. If you notice new or worsening trouble with puzzles you used to find easy, along with other memory changes, it's worth mentioning to a doctor.
Frequently asked questions
Do puzzles help prevent dementia?
Research shows that people who do puzzles and other mentally stimulating activities tend to have a lower risk of dementia, but it's not yet clear whether puzzles directly prevent it. They're best seen as part of a broader brain-healthy lifestyle.
Are crosswords or sudoku better for your brain?
Both challenge different skills. Crosswords focus on language and memory, while sudoku focuses on logic and pattern recognition. Doing a mix is likely best.
Are jigsaw puzzles good for your brain?
Jigsaw puzzles engage visual perception and spatial reasoning, and many people find them relaxing. Some studies suggest they may support certain thinking skills.
Is chess good for brain health?
Chess challenges planning, memory and problem-solving. Playing with others also adds social benefits.
How often should I do puzzles?
There's no set rule, but research suggests that doing puzzles more often is associated with better cognitive performance. Daily puzzles are a great habit if you enjoy them.
Playful challenge keeps your mind growing. Take our free wellness wheel quiz to see how your intellectual wellness compares with the rest of the wheel.
