Project Description:

The Online Sudoku Solver and Game is an interactive web-based puzzle application that allows users to play, generate, and solve Sudoku puzzles. It features a clean interface for players to enjoy solving puzzles of varying difficulty levels and also includes an automated Sudoku solver that can solve any valid puzzle in real-time using algorithms.

This project combines logical game design with algorithmic complexity (for solving), making it an ideal final-year computer science project that covers frontend interactivity, backend validation, and algorithmic problem-solving.

Technologies Used:

• Frontend: HTML, CSS, Bootstrap, JavaScript (can use React.js or jQuery)

• Backend: PHP / Node.js / Java (for generating puzzles, saving progress, and solving Sudoku)

• Database: MySQL / MongoDB (for user profiles, high scores, saved games)

Core Features:

1. Interactive Sudoku Board:

   • 9x9 grid where users can input numbers.

   • Visual cues for invalid inputs (duplicate in row/column/box).

2. Sudoku Solver:

   • Users can input any Sudoku puzzle, and the system will solve it instantly using backtracking or constraint satisfaction algorithms.

3. Puzzle Generator:

   • Randomly generates new Sudoku puzzles with difficulty levels: Easy, Medium, Hard, Expert.

4. Game Timer & Move Counter:

   • Tracks the time and number of inputs made during gameplay.

5. Hints System:

   • Optional hints to show possible candidates or reveal a cell.

6. Validation and Feedback:

   • Real-time feedback on correct or incorrect inputs.

7. Save/Resume Game:

   • Logged-in users can save progress and resume later.

8. Mobile-Responsive UI:

   • Designed for both desktop and mobile play with responsive grid and large cell input.