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These puzzles have very simple instructions, but a very wide range of difficulties, from easy to insanely complex. diese App is a great logic puzzle with two very simple rules.  The cells in each puzzle grid are divided into groups, and each group contains the numbers from 1 to N, where N is the number of cells in the group.  Each difficulty level contains 1000 unique levels.  If you are playing diese App for the first time, try the level “Novice”.  If you can easily solve the 1000st level of one difficulty level, try the first level of the next level of difficulty.  The second rule is that no two adjacent cells, including diagonal, can contain the same number.  In our application, we have created 6000 unique levels with varying degrees of difficulty.  Where level 1 is easiest and 1000 is the most difficult.  diese App, also known as Tectonics or Number Blocks, was invented in Japan.  Thus, a group containing 5 cells will contain numbers from 1 to 5.  Don’t be fooled by the size of the grid, and diese App’s apparent simplicity.  Despite these two rules, some puzzles can be incredibly difficult to solve.  This is a puzzle that can, at its most difficult, challenge the most experienced of solvers.  Be warned, this is an addictive puzzle like no other, and a uniquely satisfying one.