GridPaw
🟧 Shikaku Rectangle partition puzzle 💡 Akari Light Up puzzle 🔢 Kakuro Cross-sum puzzle 🎨 Nonogram Picture logic puzzle 🏝️ Nurikabe Islands and sea puzzle 🧩 Pictomino Spatial reasoning puzzle ❓ Help Center How to play all 6 games
📚 Arrows Puzzle Walkthrough Strategy for every level 📚 Arrows Puzzle Rules & how to play 📚 Block Blast Hints 10+ score strategies 📚 Meowdoku Guide Hints & games like it 📚 Cross Math Puzzle Rules & strategies
Help Center

GridPaw Help Center

Every GridPaw puzzle is free, browser-based and playable without an account. Pick a game below for a full guide: the rules, your first puzzle, every button on the screen, the difficulty tiers and how winning and sharing work.

→ 🟧 Shikaku Help Draw rectangles that match the numbers. 7 tiers, 3 hints per level. → 💡 Akari Help Place glowing cats, light every cell, obey the numbered walls. → 🔢 Kakuro Help Cross sums: fill runs that add to the clue, no repeats. Fog mode! → 🎨 Nonogram Help Paint by numbers. Match the row and column clues to reveal a cat. → 🏝️ Nurikabe Help Islands and sea: match the numbers, keep the sea connected. → 🧩 Pictomino Help Rebuild a cat photo piece by piece. The kids' spatial reasoning game.

Frequently Asked Questions

Do I need an account to play GridPaw games?

No. All six GridPaw games — Shikaku, Akari, Kakuro, Nonogram, Nurikabe and Pictomino — are fully playable without signing in. Progress is saved automatically in your browser. An optional Google sign-in exists only in Akari Daily and Pictomino, where it enables cloud streak sync and the leaderboard.

Are the games free to play?

Yes, every game is free, runs entirely in your browser, and needs no download. Hints come with a free allowance per level in Shikaku, Kakuro, Nonogram and Nurikabe, and are unlimited in Akari.

Which games are the classic Japanese logic puzzles?

Shikaku, Akari, Kakuro, Nonogram and Nurikabe all follow the classic Nikoli rules — GridPaw adds cat visuals and unlimited procedurally generated boards. Pictomino is a different spatial reasoning game for kids: a cat photo cut into pieces that you rebuild by logic.

Where do the daily puzzles live?

Each game has a daily cadence: Shikaku and Akari on the Daily Challenge page, and Kakuro, Nonogram and Nurikabe switch to date-seeded daily puzzles after their campaign, so everyone worldwide gets the same board on the same day. Pictomino has a separate Daily Challenge page.

Play any of these puzzles free in your browser →