Guides & tips
Strategy write-ups from the team that builds the games — how the puzzles work, how to beat the hard levels, and why some tricks work better than others.
The 2048 Corner Method: Why It Works and How to Use It
Learn the corner strategy for 2048: why pinning your biggest tile in one corner works, how to build a merge chain, and the common mistakes that end games early.
Liquid Sort Puzzles: Solving Techniques That Actually Work
Practical techniques for liquid sort puzzles: protect empty tubes, avoid burying colors, count layers, and know when undo is worth it. With worked examples.
Falling-Block Puzzle Strategy: Stack Flat, Keep a Well, Read Ahead
A practical strategy guide for falling-block puzzles: how to stack flat, keep a clean well column, read the next piece and survive the speed-up at higher levels.
How to Solve Nonograms: A Step-by-Step Method
Learn how to solve nonogram picture puzzles with overlap, edge and crossing techniques, plus a fully worked 5x5 example you can follow one line at a time.
How We Make Sure Every Puzzle Level Is Solvable
A behind-the-scenes look at how Ouleiya's sorting and logic games generate levels, check them with solvers, and tune difficulty without ever serving an impossible puzzle.
Mine Finder Patterns: 1-2-1, 1-2-2-1 and How to Guess Well
Logic patterns for mine-deduction puzzles: the 1-2-1 and 1-2-2-1 rules, wall and corner tricks, number subtraction, and how to pick the safest guess.
Nuts and Bolts Sorting Puzzles: A Beginner-to-Expert Guide
Learn to solve nuts and bolts sorting puzzles, from the basic rules to expert tactics for tight levels with one empty bolt. Clear tips with worked examples.
Which Puzzle Game Fits Your Break? A Guide by Time and Mood
Five minutes or thirty? Want to relax or to think hard? A practical guide to picking the right free browser puzzle game on Ouleiya for the time and energy you have.
Sudoku Techniques from Beginner to Expert
Learn the Sudoku techniques that solve almost every puzzle: naked and hidden singles, pairs, pointing pairs and X-Wings, plus when pencil notes pay off.
Why Sorting Puzzles Are So Satisfying
Goods sort, liquid sort and screw sort puzzles share one simple loop: turn a mess into order. Here's the design and psychology behind why these puzzles feel so good.