Sudoku

Sudoku(originallycalledNumberPlace)isalogic-based,combinatorialnumber-placementpuzzle.Theobjectiveistofilla9x9gridwithdigitssothateachcolumn,eachrow,andeachofthenine3x3sub-gridsthatcomposethegridcontainsallofthedigitsfrom1to9.


FEATURES:
-fourdifferentdifficulties
-hundredsofpuzzlesforeachdifficulty
-auto-saveyourprogressforeachpuzzle
-unlimitedundo/redo
-auto-filldrafts
-hintsystemforbeginners
-colorinputsystemforexperts
-cleaninterfaceandsmoothcontrols
-googleplaygamesachievements
-phonesandtabletssupport

HELPFULFEATURES(optional):
-selectionmodes:selectfirstornumberfirst
-pencilmodes:automaticormanual
-keyboardconfiguration:threerows,tworows,onerow
-directionhighlight:verticalandhorizontalhighlight
-numberfinder:highlightalloccurrencesofanumber
-numbercounter:showacounterforeachnumber
-ruleviolations:gamerulewarningshighlight
-keyboardhighlight:shownifnumbercountiscorrectorincorrect
-multiplecolorinput(advanced):usedifferentcolorstoplacenumbers
-automaticerrordetection:showerrorsautomatically
-permanentauto-fill:continuouslyfillallthedrafts
-biggernumbers:largefontforbettervisualization