Sudoku (originally referred to as Number Place) is a logic-based, combinatorial number-placement puzzle. The goal is to fill a 9x9 grid with digits so that every column, every row, and every of the 9 3x3 sub-grids that compose the grid accommodates all the digits from 1 to 9.

FEATURES:

- 4 different difficulties

- tons of of puzzles for each difficulty

- auto-save your progress for each puzzle

- limitless undo/redo

- auto-fill drafts

- trace system for beginners

- colour input system for experts

- clear interface and clean controls

- google play games achievements

- phones and tablets support

HELPFUL FEATURES (optional):

- choice modes: select first or quantity first

- pencil modes: automated or manual

- keyboard configuration: three rows, two rows, one row

- path highlight: vertical and horizontal highlight

- number finder: highlight all occurrences of a number

- quantity counter: present a counter for each number

- rule violations: recreation rule warnings highlight

- keyboard spotlight: proven if quantity rely is appropriate or incorrect

- multiple color enter (advanced): use totally different colours to place numbers

- computerized error detection: present errors automatically

- permanent auto-fill: continuously fill all the drafts

- bigger numbers: giant font for better visualization