Robert's Sudoku Solver

How It Works

This application solves Sudoku puzzles using a backtracking algorithm. Here's how the solving process works:

Solving Methodology

  1. The algorithm finds an empty cell in the grid
  2. It tries placing numbers 1-9 in that cell
  3. For each number, it checks three constraints:
    • The number doesn't exist in the same row
    • The number doesn't exist in the same column
    • The number doesn't exist in the same 3x3 section
  4. If the number is valid, it moves to the next empty cell
  5. If it reaches a dead end, it backtracks and tries a different number
  6. The process continues until the entire grid is filled or all possibilities are exhausted

The backtracking algorithm is guaranteed to find a solution if one exists, though it may try many different combinations before succeeding.

Choose Your Input Method

Select how you want to provide the Sudoku puzzle to be solved:

Manual Entry Mode AI Photo Mode
📱 Test Mobile Experience

Manual Entry Mode: Click on cells and type numbers directly into the grid

AI Photo Mode: Upload a photo of a Sudoku puzzle for automatic number recognition

Features

Check API Key | Test AI Mode | Debug AI Processing | Test Features | Documentation