This article includes general advice for logical reasoning problems, as well as thorough instructions for solving the most common type of logic puzzle. This type of puzzle provides a list or paragraph of clues, then asks you a question that requires you to use the clues to answer. Many books and websites that contain these logic puzzles come with a grid to help you solve them, but this article also includes instructions for making your own.

If you''''''''''''''''''''''''''''''''re new to grid-based logic puzzles, this tutorial will teach you the basics. Start with the "Introduction" first, then move on to the tutorials discussing specific clues or solving methods. Each tutorial contains a number of different slides - you can advance to the next slide by clicking "Next slide" at the bottom of each page, or by using the circled numerical links below each slide. Choose your specific tutorial from the list below to get started.

Every puzzle has a set number of categories. In this example, there are four - Prices (green), Names (yellow), Colors (pink) and Zodiac Symbols (blue). Notice how the last two categories (pink and blue) are repeated on both the top and left sides. All logic puzzle grids will follow this same pattern.

Why? The point of the logic grid is to determine whether any given item is or is not matched with any other given item. This configuration of categories allows every single item on the grid to intersect with every other item on the grid once, and only once.

Welcome to Logic-Puzzles.org, the world''''''''''''''''s largest web site devoted to logic puzzles! We''''''''''''''''ve got more than 25,000 unique puzzles available for play, both online and the old fashioned way - with pencil and paper. Feel free to solve online just for fun, or, for an added challenge, register a free account and compete against thousands of other solvers to make it into our Logic Puzzle Hall of Fame !

What is a Logic Puzzle?

Logic puzzles come in all shapes and sizes, but the kind of puzzles we offer here are most commonly referred to as "logic grid" puzzles. In each puzzle you are given a series of categories, and an equal number of options within each category. Each option is used once and only once. Your goal is to figure out which options are linked together based on a series of given clues. Each puzzle has only one unique solution, and each can be solved using simple logical processes (i.e. educated guesses are not required).

In the second half of the 20th century mathematician Raymond M. Smullyan has continued and expanded the branch of logic puzzles with books such as * The Lady or the Tiger? * , * To Mock a Mockingbird * and * Alice in Puzzle-Land*. He popularized the " knights and knaves " puzzles, which involve knights, who always tell the truth, and knaves, who always lie.

There are also logic puzzles that are completely non-verbal in nature. Some popular forms include Sudoku , which involves using deduction to correctly place numbers in a grid; the nonogram , also called "Paint by Numbers", which involves using deduction to correctly fill in a grid with black-and-white squares to produce a picture; and logic mazes , which involve using deduction to figure out the rules of a maze.