CoverletLearn the Shikaku puzzle, then try the rectangle logic.
The rule is compact: divide a grid into rectangles so each numbered clue belongs to a rectangle with the matching area.
The rule in one sentence
Each number gives the area of one rectangle. Draw rectangles that fit the grid, do not overlap, and leave no gaps when the board is complete. The Shikaku guide explains the vocabulary without assuming prior experience.
Start with the most constrained clue
Look for a corner or edge clue, or a number with only a few factor pairs. Then compare each candidate rectangle with nearby clues and empty cells. The goal is to turn a possible shape into a move that the board requires.
Let each rectangle change the next one
When a rectangle is confirmed, treat its cells as unavailable to the remaining clues. Recalculate the neighbours and keep looking for the next forced placement instead of guessing.
Practise the logic in Coverlet
Coverlet's Patchwork uses the same readable rectangle-and-area idea inside a daily quilt game. When you want a step-by-step example, use the 5x5 walkthrough.
Keep exploring
More from the Coverlet Journal
What is Shikaku? A clear guide to the rectangle puzzle
The rules, vocabulary, and first deductions behind the classic rectangle logic puzzle.
Understand Shikaku →How to solve a 5x5 Shikaku puzzle step by step
Use a repeatable five-step method to solve a small Shikaku board without guessing.
Solve a 5x5 board →How to solve Shikaku puzzles: a beginner's strategy guide
A step-by-step strategy for solving Shikaku-style rectangle puzzles without guessing.
Solve the puzzle →Shikaku vs Sudoku vs Nonogram: how the puzzles differ
Compare the clue systems and deduction styles of Shikaku, Sudoku, and Nonograms.
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