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.
Riddle10 blog
Articles about graph puzzles
Shortest Route Puzzles: How to Find the Fewest Steps by Hand
Spread outward from the start, settle the nearest place first and trace back. Worked road map, rook board example, reachability check and a practice puzzle.
One-Stroke Drawing Puzzles: How to Solve Them by Counting Lines
Count the lines at each dot to see if a figure can be drawn in one stroke and where to start. Method, worked example, arrow version and practice puzzles.
How to Solve the Knight's Tour Puzzle, Step by Step
Visit every square once with a knight: the move, open and closed tours, the colour rule, a smart rule of thumb, and fully worked 5x5, 6x6 and 8x8 tours.