What Is a Logic Puzzle? Parts, Kinds and a Worked Example
A logic puzzle gives facts and rules, and the answer follows by deduction alone. Its parts, its kinds, what makes a good one, and a classic solved step by step.
Riddle10 blog
Articles about logic puzzles
What Is a Maze Puzzle? Paths, Walls, Dead Ends and How to Solve One
A maze puzzle is a set of paths and walls with a start, a goal and dead ends. Learn its parts, its kinds, the graph view and how to find the shortest route.
Types of Puzzles: Six Groups by the Material You Work With
Word, number, picture and spatial, physical piece, pure logic and chessboard puzzles: what each type of puzzle uses and how to begin.
Gear Train Puzzles: Which Way Does the Last Gear Turn?
Meshing gears turn opposite ways, so count the contacts. Learn why odd rings jam, how belts change direction, and solve a worked gear train puzzle.
Dot-to-Dot Path Puzzles: How to Join Every Dot Exactly Once
Join every dot once in a single path: count partners, fix forced links, use hop-length and arrow rules. With a worked row example and a practice grid.
Map Colouring Puzzles: How to Use the Fewest Colours
Colour every region so neighbours differ, with as few colours as possible. Dots and lines, greedy colouring, backtracking, a worked map and a practice puzzle.
Puzzle With a Unique Solution: How Designers Make Sure
A good puzzle has exactly one answer. How designers and researchers check every possibility so a puzzle ends with a single solution.
Derangement Puzzles: How to Count Mix-Ups With Nothing in Place
How to count and solve derangement puzzles where no jar, key or tile may stay in its own place, with the counting rule, a table and a clue puzzle.
How to Solve House and Neighbour Logic Puzzles
Turn left, right and next-to clues into tiles on a strip of houses, test the few places each can sit, and finish with one row. Worked example and practice.
Process of Elimination in Puzzles: Rule Out Until One Is Left
How to use the process of elimination in puzzles: list options, cross out what fails, and add a guess-and-check step when you stall. Worked grids.
Knights, Knaves and Normals: Three-Type Logic Puzzles
Knights, knaves and normals puzzles with a truth-teller, a liar and a normal who can say either: a case method, a worked example and a practice puzzle.
Self-Referential Puzzles: How to Solve Statements About Themselves
Test every scenario and keep the one where each statement matches its own truth: liar claims, counting lists, self-counting sentences and sequences.
How to Solve Scheduling Puzzles: Orders, Rounds and Clashes
Turn each clue into a before, after or same-round rule, fix the ends first and fill the rest. A worked ordering puzzle and a round schedule to practise.
Seating Arrangement Puzzles: How to Solve Round and Row Tables
Fix one seat, place locked pairs, split into cases and test each clue. A worked round-table puzzle, the own-seat rule and a practice puzzle with answer.
Hat Colour Puzzles: How to Reason From What Others See
Solve hat colour puzzles by listing every pattern and striking out what each answer rules out. A worked example, the classic game and a practice puzzle.
How to Solve Boat-Placement Puzzles: Find Every Hidden Boat
Use row and column counts and the no-touching rule to find every hidden boat. A clear method, a worked six by six puzzle and a practice grid.
How to Solve Pair-Matching Path Puzzles: Join Every Pair
Join equal numbers with paths that never cross and fill every cell. Learn corner and edge forcing, then try a worked puzzle and a practice grid.
How to Solve Star-Placement Puzzles: Stars That Never Touch
Place stars in every row, column and region so that none touch, even at corners. Five core moves, a worked five by five puzzle and a practice grid.
How to Solve Building Height Puzzles: Count What You Can See
Read edge clues as visible buildings, use the tallest-at-the-edge and cap rules, then follow a worked four by four building height puzzle and a practice grid.
How to Solve Sum Grid Puzzles: Runs, Totals and Digit Sets
Learn the totals that allow only one set of digits, use crossing runs and the no-repeat rule, then follow a worked sum grid puzzle and try a practice grid.