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Nonogram — logical deduction & patterns

💡Benefits

Nonogram (a Japanese crossword) is a pure logic puzzle: from the number clues the child deduces which cells must be filled AND which must stay empty. It strengthens deductive reasoning, working memory and spatial perception (Diamond, 2013). It builds the habit of acting on proof rather than guessing.

🎮How to play

Next to each row (left) and column (top) there are numbers — these are groups of consecutive filled cells. For example “3 1” means: first 3 cells, then at least one gap, then 1 cell. In Fill mode tap cells to fill them, and in Mark mode place an ✕ on cells you believe are empty. The puzzle is solved when the filled cells exactly match the hidden picture. 3 levels: 5×5, 10×10, 15×15.

📚Scientific sources

  1. Diamond (2013). Executive functions. Annual Review of Psychology, 64, 135–168. https://scholar.google.com/scholar?q=Executive+functions+Diamond+2013+Annual+Review+of+Psychology

❓Frequently asked questions

Yes, Nonogram on MentalMath is free and needs no registration.
Painting cells by the number clues to reveal a hidden picture strengthens logical deduction and sustained concentration.
Suitable from age 7, beginning with small grids and gradually growing harder.
Yes, painting the cells is comfortable on a phone or tablet screen.
10-15 minutes a day revealing the picture builds the habit of analysing clues step by step.
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