Sudoku Sidekick

Sudoku Sidekick helps you solve Sudoku puzzles with clear, step-by-step guidance. It reads the current board, checks your visible pencil marks, and suggests the next useful move without taking over the puzzle. When you are stuck, it can highlight a focused cell, explain the reasoning, or suggest where to complete candidates next. Built for players who want a helpful companion, not a spoiler machine. Currently supports the New York Times Sudoku board. More puzzle sites are expected soon. What's new: • Fixed compatibility with updated board labels, preventing filled cells from being mistaken for empty ones. • Added a floating Sidekick button so you can open hints directly from the puzzle. • Made the panel more compact for smaller laptop screens. • Simplified candidate instructions and kept “Check next” visible. • Improved safeguards so unreadable boards do not produce misleading hints.