the way to play the original SuDokuThe goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once. Each number in the solution therefore occurs only once in each of three "directions" (wikipedia).BENEFITS:FREE SupportBest selling Sudoku for PDAsExcellent Quality Product100% Money-back GuaranteeFull VGA and square-display devices support (Treo W700, HP65xx)Save/load to/from a number of external formatsExtended HINTS systemMemory and Battery life optimizedOptimized for one-hand usePuzzles in 6 difficulty levelsSkinable user interfaceNewspaper puzzle solverPencil MarksOption to check incorrect inputQuick Save / Load gameStatisticsScreenshots Square Screen DevicesScreenshots VGA or QVGA Screen Devices