Notes about queens puzzles, logic, strategy design, and what we are building.
- How to Solve Futoshiki Puzzles: A Beginner's Guide
New to Futoshiki? Learn the rules, pencil marks, inequality chains, and AB elimination with a step-by-step 5x5 worked example anyone can…
- Queens Puzzle Grid Size Difficulty: 7x7 to 9x9 Tips
Why do bigger Queens boards feel so much harder? Learn how constraints multiply from 7x7 to 9x9 and beyond, plus size-specific strategies…
- Can Puzzles Prevent Dementia? What Research Shows
Can puzzles prevent dementia? Here's what the Bronx Aging Study, Texas A&M research, and other studies actually show — and what they don't…
- How to Solve Hitori Puzzles: A Beginner's Guide
Learn how to solve Hitori puzzles step by step, from the three core rules to XYX patterns and triples, with a deduction sequence built for…
- How to Solve Kakuro Puzzles: A Beginner's Guide
Learn how to solve Kakuro puzzles step by step. This beginner guide covers the rules, unique sum combinations, and a worked example to…
- How Queens Puzzle Difficulty Levels Are Determined
Learn what actually makes a Queens puzzle Easy, Medium, Hard, or Master — grid size, region shape, and deduction depth — plus how to pick…
