How to Solve Loop Puzzles: The Inside and Outside Method
Draw one closed loop by the numbers. Label cells inside or outside, use zeros, corners and the dot rule, then try a worked and a practice puzzle.
Riddle10 blog
Articles about logic puzzles
How to Solve Latin Square Puzzles: Two Moves and a Worked Grid
Fill each row and column with every symbol once. Learn the only-candidate and only-place moves, a full worked grid and a practice puzzle.
How to Solve Picture Logic Puzzles: Fill-by-Number Grids
Read row and column clues as blocks, use overlap and exact fit, and reveal the hidden picture. A worked five by five puzzle and a practice grid.
Types of Logic Puzzles: Nine Kinds and How to Start Each
Grid, truth-teller, weighing, sliding tile, peg, knight's tour, packing, maze and sequence puzzles: what each logic puzzle type is and how to begin.
Logic Grid Puzzles: How to Solve Them With X and Tick
Mark X for no and tick for yes, use the only-one-left rule and chain clues across the grid. A full worked logic grid puzzle and a practice puzzle.
How to Solve Brain Teasers: 8 Tools and When to Use Them
Eight solving tools matched to the four types of brain teaser, with five worked examples and the mistakes that trip people up.
Chess Board Puzzles: How Many Queens Fit, With and Without Pawns
From eight queens to a quarter of the board: what peer-reviewed papers say about queens, pawns, dragon kings and the distance between squares.
Truth-Teller and Liar Riddles: How to Solve Them
Assume, test, and look for the clue that rules out the mirror answer. A clear method for truth-teller and liar logic puzzles with worked examples.
How to Solve Coin Weighing Puzzles, Step by Step
Split the coins into three groups, not two. A clear method for balance scale puzzles, from 9 coins in 2 weighings to the classic 12-coin puzzle.
What Is a Puzzle? A Definition From Mathematics and Puzzle Design
A puzzle has a fixed start, fixed rules and a clear goal. What research says makes a puzzle good, what makes it hard, and when it has no solution.
How to Solve Water Jug Puzzles, Step by Step
Solve two-jug water puzzles with one loop: fill, pour, empty, repeat. Learn which amounts are possible, how to find the fewest moves, and practise.
History of Puzzles: Six Classic Puzzles and Where They Came From
A short history of puzzles: eight queens in 1848, the 15-puzzle from the 1870s, the 70 square, coin weighing, truth-tellers and colour cubes.