Sudoku Solver
Type in a puzzle, hit solve. The interesting part isn't the backtracking — it's choosing which cell to guess at next.
Built with this prompt
Build a Sudoku solver in React with: - A 9x9 input grid with thicker borders around each 3x3 box - Cells accept only 1-9; typing replaces the digit - Live conflict highlighting for duplicates in any row, column, or box - A backtracking solver that picks the empty cell with the fewest candidates first (MRV) - Solved digits rendered in a different colour from the entered clues - Buttons: Solve, Clear, and three sample puzzles (easy / hard / evil) - Report solve time and say so clearly when a grid is unsolvable - Dark theme, no dependencies