Sudoku Premium

Sudoku Premium

• * 4 difficulty levels
• * 3 input modes: "Digit first", "Cell first", popup
• * Pencil marks (a.k.a. Notes) with auto fill / erase option
• * Selected digit and various other highlighting options
• * Show digit counts option
• * Auto-save
• * Unlimited Undo and Redo
• * Intelligent hints that use only logic
• * Two levels of automatic error checking option
• * Submit results and track progress online
• * Top scores and History
• * Real time competitions