Logic

Logic puzzle families explained: Sudoku, Kakuro, Hashi, Nurikabe and more.

• MyRin Infinity Loop: Rules and Solving Techniques

  How to solve Infinity Loop in MyRin: rotate wire tiles until every lamp lights. Piece types, how many turns each really has, and the edge-first method.

• Kakuro vs Sudoku: Which Puzzle Trains What?

  Sudoku is pure constraint logic with no arithmetic. Kakuro adds sums and a second constraint. How the two differ, which is harder, and what each one exercises.

• Sudoku Difficulty: What Actually Makes a Puzzle Hard

  Difficulty is not the number of givens. It is which techniques a puzzle forces you to use. The ladder from naked singles to X-wings, and how ratings are set.

• MyRin Block Puzzle: How to Stop Running Out of Space Before the Target

  Block Puzzle is a spatial planning game, place three block shapes on a 10×10 grid and clear full lines.

• MyRin Number Sequence: A Systematic Method for Finding Any Pattern

  Number Sequence asks you to find the rule in a series of numbers. There's a four-step method that identifies any sequence type, arithmetic, geometric.

• MyRin Pattern Matching: Identify Transformations Faster with

  Pattern Matching tests visual reasoning, find which option matches or continues a reference pattern.

• MyRin Sudoku: Three Techniques That Solve Every Puzzle Without

  Sudoku is a constraint satisfaction puzzle. Every cell is solvable by logic, no guessing required.