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Enjoy almost unlimited number of diese App problems with beautifully refined user interface. (With Retina screen supports!  For the diese App biginners, Quick Mode with the automatic memo functionality is now available!  Thanks to the optimized interfaces, you can focus on solving diese App problems.  Undo helps the diese App problems be traced back to its previous state.  In Memo mode, press and hold the button to put numbers. 3.  Every column must contain the numbers from 1 to 9 with no duplicate numbers in each culumn.  Each level set contains one thousand diese App problems.  Moonrabbit diese App's design perfectly blends with enhanced usability!  Every row must contain the numbers from 1 to 9 with no duplicate numbers in each row.  A region (3X3 box) also has to contain the numbers from 1 to 9 with no duplicates.  Challenge people all around the world with a new diese App problem every day.  The best iphone diese App app is back with much more awesome features!  Guide lines & Duplicated number highlighting will help you reduce time-consuming mistakes.  You don't anymore need to resart the game from the bigining when you reallize you made a mistake in the middle of the game.  Supports various languages. (Currently Korean and English. 1.  You can check your records at a glance with the various types of graphs.