Puzzle guides
Short, practical guides to the puzzles on Gridarium. Each one ends with a puzzle to try.
How to solve a Sudoku
The two moves that solve most puzzles, with worked examples on a real grid.
Read the guide
Choosing a first guess in Five Letters
Which letters to try first, three opening words, and how to read your results.
Read the guide
Word search tips
Scan for the first letter, hunt the unusual words first, and use the theme.
Read the guide
How to solve a nonogram
Read the clues, find the cells that are certain, and let the crossing lines do the rest.
Read the guide
How to solve Categories puzzles
Start with what you are surest of, watch for a word that fits twice, and read the tricks.
Read the guide
Mental math tricks
Round and adjust, break numbers apart, double and halve: simple habits that make sums easy.
Read the guide
Pairs memory tips
Build a map of the cards, name what you see, and use the first card of each turn well.
Read the guide
Mini crossword tips
Start with the clue you are sure of, use the letters the crossing words give you, and check as you go.
Read the guide
How to solve Killer Sudoku
Learn the cages that have only one answer, then let the rule of 45 crack the box.
Read the guide
How to solve Suguru
Fill the small regions first, then let the touching rule cross digits out.
Read the guide
How to solve Jigsaw Sudoku
Treat each piece like a box, then watch where pieces reach into the lines.
Read the guide
How to solve Kakuro
Learn the runs with one answer, then let the crossings settle the squares.
Read the guide
How to solve a binary puzzle
Pairs, gaps and counting settle most squares; then rule out the impossible.
Read the guide
How to solve Futoshiki
Cross out what the signs forbid, follow the chains, then the singles do the rest.
Read the guide
How to solve Slitherlink
Cross out around the 0s, pair the 3s, and keep every dot at 0 or 2 lines.
Read the guide
How to solve Star Battle
Dot the neighbours of every star, then count stars against rows and regions.
Read the guide
How to solve Calcudoku
Start with the cages that have one answer, then let rows and columns do the rest.
Read the guide
How to solve Bridges
Start with the islands that have no choice, then make sure nothing gets cut off.
Read the guide