Coverlet app iconCoverlet
Logic puzzles

Logic puzzles that reward clear thinking.

Start with the rule, find the forced move, and let each solved cell make the next decision easier.

Coverlet Patchwork board showing numbered clues for a rectangle logic puzzle
Patchwork turns area clues into a complete rectangle partition.

Start with these guides

Coverlet Patchwork board showing numbered clues and completed rectangle patches

What is Shikaku? A clear guide to the rectangle puzzle

The rules, vocabulary, and first deductions behind the classic rectangle logic puzzle.

Understand Shikaku →Coverlet Patchwork board used as a 5x5 Shikaku-style rectangle puzzle example

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 →Coverlet Patchwork board for a Shikaku-style rectangle puzzle

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 →Coverlet Patchwork board with numbered rectangle clues for logic puzzle comparison

Shikaku vs Sudoku vs Nonogram: how the puzzles differ

Compare the clue systems and deduction styles of Shikaku, Sudoku, and Nonograms.

Compare the puzzles →Coverlet Patchwork logic puzzle

Logic puzzle solving tips: start with certainty

Find forced moves, count consequences, and finish without guessing.

Learn the method →

Keep exploring

Play the relevant Coverlet modes

ExplorePatchworkRectangle-area logic with a clear first move.ExploreAppliquéConnected colour regions for a more visual deduction.

Find the right doorway

Explore Coverlet by intent.

ExploreLogic puzzle gameCoverlet is a daily logic puzzle game with six modes, three board sizes on full-fidelity devices, and a personal quilt that keeps completed solves.ExploreOffline puzzle gameCoverlet is an offline puzzle game for iPhone and iPad with on-device daily boards, clear logic, private core play, and a quilt that keeps completed solves.ExploreDaily puzzle gameCoverlet is a daily puzzle game with six techniques, three board sizes on full-fidelity devices, on-device generation, and a personal quilt for completed solves.ExploreShikaku puzzleLearn the Shikaku rectangle logic puzzle: match each numbered clue to a rectangle with the right area, then practise the same idea in Coverlet Patchwork.

Return to the Coverlet Journal for the full collection of solving guides, travel notes, and design stories.

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