From krazydad, constructor of the wildly popular and addictive puzzles published in The New York Times as Two Not Touch, here are 360 of your favorite Star Battle puzzles. These puzzles will provide a healthy diversion for you in these challenging times, and help you make it to the other side with your sanity intact! Includes an instructive and pithy tutorial.

Solvers will be over the moon about this huge collection of all-new logic puzzles! Star Battle is a growingly popular logic puzzle that, like sudoku, is simple to understand but offers a great deal of complexity and variety. In Star Battle, a 10x10 grid is divided into 10 irregular regions of different sizes. Each row, column, and region contain exactly two stars--and no stars in the grid may touch each other, even diagonally. This book contains a whopping 300 Star Battle puzzles, including short sections with one-star puzzles (as a warmup) and three-star puzzles (for an extra challenge). Author Jim Bumgardner also provides a helpful how-to-solve introduction, explaining the rules and some of the basic solving strategies.

Since 1992, more than 25 countries have sent teams to the annual World Puzzle Championship—a global competition for puzzle supremacy and international bragging rights. The puzzles are created by top constructors of many nationalities, with an emphasis on visual, math, logic, and observation skills. All puzzles at these competitions are language- and culture-neutral, making them ideal for people of any background. This book contains nearly 70 puzzles from the 12th World Puzzle Championship, held in the Netherlands, as well as a complete US Puzzle Championship test, used to select members of the US and Canadian teams. Along with favorites such as Sudoku, Battleships, Paint by Numbers, Cross Sums, and observation puzzles, you'll find a fascinating array of less familiar puzzle varieties, including some you may never have seen before. After you master them, visit the official Team USA Web site at wpc.puzzles.com. The annual online qualifying test is open to everyone!

The New York Times bestselling author of The Year of Living Biblically goes on a rollicking journey to understand the enduring power of puzzles: why we love them, what they do to our brains, and how they can improve our world. “Even though I’ve never attempted the New York Times crossword puzzle or solved the Rubik’s Cube, I couldn’t put down The Puzzler.”—Gretchen Rubin, author of The Happiness Project and Better Than Before What makes puzzles—jigsaws, mazes, riddles, sudokus—so satisfying? Be it the formation of new cerebral pathways, their close link to insight and humor, or their community-building properties, they’re among the fundamental elements that make us human. Convinced that puzzles have made him a better person, A.J. Jacobs—four-time New York Times bestselling author, master of immersion journalism, and nightly crossworder—set out to determine their myriad benefits. And maybe, in the process, solve the puzzle of our very existence. Well, almost. In The Puzzler, Jacobs meets the most zealous devotees, enters (sometimes with his family in tow) any puzzle competition that will have him, unpacks the history of the most popular puzzles, and aims to solve the most impossible head-scratchers, from a mutant Rubik’s Cube, to the hardest corn maze in America, to the most sadistic jigsaw. Chock-full of unforgettable adventures and original examples from around the world—including new work by Greg Pliska, one of America’s top puzzle-makers, and a hidden, super-challenging but solvable puzzle—The Puzzler will open readers’ eyes to the power of flexible thinking and concentration. Whether you’re puzzle obsessed or puzzle hesitant, you’ll walk away with real problem-solving strategies and pathways toward becoming a better thinker and decision maker—for these are certainly puzzling times.

Keeping students involved and actively learning is challenging. Instructors in computer science are aware of the cognitive value of modelling puzzles and often use logical puzzles as an efficient pedagogical instrument to engage students and develop problem-solving skills. This unique book is a comprehensive resource that offers teachers and students fun activities to teach and learn logic. It provides new, complete, and running formalisation in Propositional and First Order Logic for over 130 logical puzzles, including Sudoku-like puzzles, zebra-like puzzles, island of truth, lady and tigers, grid puzzles, strange numbers, or self-reference puzzles. Solving puzzles with theorem provers can be an effective cognitive incentive to motivate students to learn logic. They will find a ready-to-use format which illustrates how to model each puzzle, provides running implementations, and explains each solution. This concise and easy-to-follow textbook is a much-needed support tool for students willing to explore beyond the introductory level of learning logic and lecturers looking for examples to heighten student engagement in their computer science courses.

Bizarre imagination, originality, trickiness, and whimsy characterize puzzles of Sam Loyd, America's greatest puzzler. Present selection from fabulously rare Cyclopedia includes the famous 14–15 puzzles, the Horse of a Different Color, and 115 others in various areas of elementary math. 150 period line drawings.