Blank Grid - Play Your Own Sudoku Puzzles
Our online Sudoku blank grid can fulfill your needs. Just enter a valid Sudoku puzzle in the blank grid above. Submit the puzzle, and we will prepare the game for you. Then you can play your own Sudoku puzzle on our interface with all its features.
Blank Grid - Play Your Own Sudoku Puzzles
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 mouse.
Sudoku Solver - Solve Your Puzzles Step by Step
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 behind each step and how the digit to be filled in each empty cell is determined.
Sudoku 9x9 - Free Online Sudoku Puzzles
Play free online Sudoku puzzles on our featured Sudoku game interface. Learn Sudoku solving techniques through numerous examples with our smart Sudoku solver.
Sudoku 9x9 - Extremely Hard Sudoku Puzzles for Experts
Play free online (extremely hard) Sudoku puzzles on our featured Sudoku game interface. You can fill in candidates, highlight cells, undo or redo steps, check mistakes, and more, so that you can apply the logic to solve the puzzles more conveniently.
Sudoku 9x9 - Free Online Sudoku Puzzles (Intermediate)
Play free online (intermediate) Sudoku puzzles on our featured Sudoku game interface. You can fill in candidates, highlight cells, undo or redo steps, check mistakes, and more.
Sudoku 9x9 (Classic Desktop Version) - Extremely Hard Sudoku …
Play extremely hard Sudoku puzzles on your desktop computer with keyboard and mouse.
Swordfish - Sudoku Solving Technique
Swordfish - an advanced Sudoku solving technique. Principles explained and illustrated with examples.
Sudoku
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-grids (called "blocks") B1 to B9. Each row, each column, and each 3x3 block have nine squares (called "cells"), respectively.
Sudoku 9x9 - Free Online Sudoku Puzzles (Very Hard)
Play free online (very hard) Sudoku puzzles on our featured Sudoku game interface. You can fill in candidates, highlight cells, undo or redo steps, check mistakes, and more.