可変サイズ ナンプレ

【How to Play】
①Select a square ➔ ②Enter a number/color from the buttons below the screen or use keyboard input

【Overview】
A familiar Sudoku puzzle that lets you arrange numbers to spark your mind, now playable in your favorite size!

You can choose a board size from 2×2 to 20×20, so it's perfect for quick one-minute challenges during spare moments or for tackling ambitious large puzzles.

There are three difficulty levels—Easy, Normal, and Hard—and you can choose from four visual themes (Classic, Dark, Pastel, and Retro) depending on your mood. You can also adjust the font size, so even large boards remain easy to read.

The rules are simple.
Just select a square and enter a number using the number buttons or keyboard.
With the keyboard, 1–9 work as-is, 0 corresponds to 10, and Q through P correspond to 11–20, so you can input smoothly even on large boards.
If you're stuck, use "Memo" to jot down candidates discreetly, and use "Color Marking" to color-code squares and organize your deductions.
If the same number appears twice, it turns red to alert you, and you can undo up to 30 moves back, so you're safe.
When you hit a wall, use "Hint" to peek at the answer for just one square.

The timer can be paused, and your personal best for each size and difficulty level is recorded.
Your progress is automatically saved, so you can pick up where you left off even after closing.
When you complete the puzzle, confetti celebrates your victory 🎉 Now go fill in the next square!