Sudoku Rules
Every row, column, and 3x3 box must contain the numbers 1 to 9 exactly once.
Sudoku Academy
Learn the logic behind every confident Sudoku move.
This section will become the learning home for SudokuIQ: rules, solving techniques, coach explanations, examples, and future videos. For now, it gives players and search engines a clear educational starting point.
Naked Singles
When a cell has only one possible candidate left, that candidate must be the answer.
Hidden Singles
When a number can go in only one cell within a row, column, or box, place it there.
Coach Thinking
Read each move as a reason, not a guess. The web coach will grow around this learning path.