Blank grid - Play your own Sudoku puzzles on our online Sudoku game interface with various features such as pencil marks, one key filling all candidates, background highlights, undo/redo …

Online blank Sudoku grid (desktop version) with multiple features: pencil marks, background highlights, undo-redo functions and more. Play your own Sudoku puzzles with keyboard and …

Play free online (easy) Sudoku puzzles on our featured Sudoku game interface. You can fill in candidates, highlight cells, undo or redo steps, check mistakes, and more.

Play free online Sudoku puzzles on our featured Sudoku game interface. Learn Sudoku solving techniques through numerous examples with our smart Sudoku solver. Our online blank grid …

Naked Single is another basic technique for solving Sudoku puzzles. For an empty cell in a Sudoku puzzle, nine digits from 1 to 9 may be candidates. Based on the Sudoku rules, no …

Online Sudoku Solver. This online Sudoku solver is unique on the web. It not only gives the solution to each valid Sudoku puzzle instantly, but also explains the techniques and logic …

XYZ-Wing - an advanced Sudoku solving technique. Principles explained and illustrated with examples.

A Sudoku puzzle is typically played on a 9x9 grid. In a classic Sudoku grid (see Figure 1 below), there are nine horizontal rows R1 to R9, nine vertical columns C1 to C9, and nine 3x3 sub …

As Sudoku is a logic-based game, all invalid puzzles should not be included in the Sudoku database. We only offer valid Sudoku puzzles. Every Sudoku puzzle you play on our website …

Daily Sudoku - Extremely Hard Sudoku Puzzles. Play a fresh Sudoku game every day, and your brain will stay fresh. Here is a new extremely hard Sudoku puzzle offered by our website today.