Online Sudoku - Classic Number Puzzle Game

Seele01-Flash
By
Online Sudoku offers unlimited free number puzzles with daily challenges and competitive leaderboards. Train your brain with the world's most popular logic puzzle game, accessible directly in your browser.

Prompt

MODEL: Seele01-Flash
Please use Three.js to generate a **mobile-first game** with the theme "Online Sudoku 3D". Please read the following detailed game design requirements first, and then generate the code accordingly: ### 1. Assets & Environment * **Visual Style:** Clean, minimalist 3D aesthetic with a soft, pastel color palette inspired by the screenshot (warm muted reds, creams, and whites). The design should look like a high-quality, physical board game made of smooth matte plastic or wood. * **The Board:** Instead of a flat 2D grid, generate a slightly raised 9x9 3D board. The 3x3 sub-grids should have subtle variations in height or base color (e.g., alternating between soft cream and very light pink) to visually separate them without needing harsh grid lines. The cells should look like recessed slots. * **The Tiles:** Numbers (1-9) should be rendered on 3D tiles (cubes or cylinders) that "slot" into the board with a satisfying animation. * **Pre-filled numbers:** Dark grey or black text, tiles are locked in place. * **User inputs:** Blue or distinct color text to differentiate from puzzle clues. * **Error highlights:** If a conflict exists, the conflicting tiles should glow soft red or pulse. * **Background:** A smooth, gradient background (deep salmon to light pink) that matches the screenshot's vibe, possibly with slow-moving, abstract geometric shapes in the distance to add depth without distraction. * **Optimization:** Use low-poly geometries for tiles. Use instanced meshes for the grid cells and number tiles to ensure 60fps performance on mobile devices. Use simple Lambert or Phong materials for performant lighting. ### 2. Audio Requirements * **BGM:** A calm, lo-fi or ambient piano track. It should be repetitive but non-intrusive, focusing on "focus" and "relaxation." * **Sound Effects (SFX):** * **Tile Placement:** A soft, tactile "clack" or "thud" sound, similar to placing a wooden piece on a board. * **Selection:** A subtle "pop" or high-pitched click when tapping a cell. * **Mistake:** A gentle, low-frequency buzz or dull thud (avoid harsh buzzers). * **Completion:** A harmonious, ascending chord progression or chime when a row, column, or block is successfully filled, and a larger fanfare for completing the whole puzzle. * **Pencil Mode:** A scratching paper sound when adding notes. ### 3. Gameplay Loop * **Core Mechanic:** Standard 9x9 Sudoku rules. The player must fill the grid so that every row, column, and 3x3 box contains the digits 1 through 9. * **Validation:** * Implement logic to generate a valid Sudoku puzzle (or load a pre-defined one). * Real-time conflict detection: If the user places a '5' in a row that already has a '5', visually highlight both numbers immediately. * **Game Modes:** * **Standard Mode:** Timer counts up. * **Daily Challenge:** A specific seed based on the current date. * **Win State:** When the board is full and valid, trigger a confetti particle effect and display a "Victory" modal with the time taken and a "Submit to Leaderboard" button. ### 4. Mobile Controls & Interaction * **Orientation:** Portrait mode (Vertical) is mandatory for this puzzle type to accommodate the grid and the number pad below it. * **Input Method:** 1. **Select Cell:** Tap a cell on the 3D board. The camera should slightly pan or zoom to focus on the selected area if necessary. The selected cell highlights with a glowing border. 2. **Input Number:** A fixed UI number pad (digits 1-9, plus 'Clear' and 'Note' toggle) sits at the bottom of the screen. * **Smart Interactions:** * **Highlighting:** When a cell with a number (e.g., 4) is selected, all other '4's on the board should slightly light up to help the player scan the board. * **Pencil/Note Mode:** A toggle button that allows the user to input small, temporary candidates into a cell without committing to a final answer. * **Haptic Feedback:** Trigger a light vibration (using `navigator.vibrate` if available) when placing a tile or selecting a number. * **UI Layout:** Ensure the number pad buttons are large (minimum 44x44px target area) and placed in the "thumb zone" at the bottom of the screen for easy one-handed play. The top area displays the Timer, Difficulty, and Mistakes count. Do not ask for clarification. Do not request confirmation. Directly execute the generation task based on the given instructions.

Game Introduction

About the Game

Online Sudoku is the ultimate destination for classic number puzzle enthusiasts. This free browser-based game brings you unlimited Sudoku challenges with fresh daily puzzles and competitive gameplay features. Whether you're a beginner learning the ropes or a seasoned puzzle solver seeking mental stimulation, this platform offers the perfect Sudoku experience without any downloads or installations required.

The game features clean, intuitive design with clear number placement and helpful visual cues. Each puzzle follows traditional Sudoku rules where you must fill a 9x9 grid so that every row, column, and 3x3 box contains all digits from 1 to 9.

Core Features

Daily Fresh Puzzles

Receive brand new Sudoku challenges every single day, ensuring you never run out of mental exercises. The daily puzzle system keeps the experience fresh and gives you something to look forward to each day.

Unlimited Puzzle Library

Beyond daily challenges, access an extensive collection of Sudoku puzzles ranging from easy to expert difficulty levels. Play as many puzzles as you want, whenever you want, with no restrictions or time limits.

Competitive Leaderboards

Compete with players worldwide through integrated leaderboard systems. Track your solving times, accuracy rates, and overall performance against other Sudoku enthusiasts. Climb the rankings and establish yourself as a top puzzle solver.

Multiple Difficulty Levels

Choose from various difficulty settings: - Easy : Perfect for beginners and casual play - Medium : Balanced challenge for regular players - Hard : Advanced puzzles for experienced solvers - Expert : Ultimate test for Sudoku masters

Brain Training Benefits

Regular Sudoku practice enhances cognitive functions including logical reasoning, pattern recognition, memory, and concentration. It's an excellent way to keep your mind sharp and engaged.

Game Rules & Strategy

Basic Rules

  • Fill the 9x9 grid with numbers 1-9
  • Each row must contain all numbers 1-9 exactly once
  • Each column must contain all numbers 1-9 exactly once
  • Each 3x3 box must contain all numbers 1-9 exactly once
  • Use logic and deduction - no guessing required

Solving Techniques

Scanning Method : Look for numbers that can only fit in one position within a row, column, or box.

Cross-Hatching : Use the process of elimination by checking which numbers are already present in intersecting rows and columns.

Candidate Lists : For advanced puzzles, track possible numbers for each empty cell to identify patterns and contradictions.

Operation Guide

Getting Started

  1. Select Difficulty : Choose your preferred challenge level from the main menu
  2. Click Empty Cells : Select any empty square in the 9x9 grid
  3. Enter Numbers : Use keyboard (1-9 keys) or click number buttons to fill cells
  4. Check Progress : The game highlights conflicts and validates your entries in real-time
  5. Submit Solution : Complete the puzzle to see your solving time and accuracy

Advanced Controls

  • Pencil Mode : Add candidate numbers to cells for complex puzzles
  • Hint System : Get strategic hints when stuck (use sparingly for better scores)
  • Undo/Redo : Correct mistakes easily with built-in history controls
  • Auto-Save : Your progress saves automatically - resume anytime

Mobile Optimization

The game works seamlessly on smartphones and tablets with touch-optimized controls. Tap cells to select, use the number pad for input, and enjoy smooth gameplay on any screen size.

Why Play This Sudoku Game

Educational Benefits

Sudoku is scientifically proven to improve cognitive function, enhance problem-solving skills, and boost memory retention. Regular play can help maintain mental acuity and provide a fun way to exercise your brain.

Stress Relief & Relaxation

Focusing on number puzzles provides excellent stress relief and mental relaxation. The meditative quality of logical problem-solving helps clear your mind and reduce anxiety.

Completely Free Access

Enjoy full functionality without paywalls, subscriptions, or hidden costs. All puzzles, difficulty levels, and features are available free of charge.

No Installation Required

Play instantly in any modern web browser without downloading apps or software. Perfect for quick mental breaks at work, school, or home.

Global Community

Join millions of Sudoku players worldwide. Share achievements, compare scores, and participate in friendly competition through the leaderboard system.

Frequently Asked Questions (FAQ)