Sudoku Battle of Kings

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Introduce
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Sudoku is a logic-based, combinatorial number-placement puzzle.
The objective is to fill a 9×9 grid with digits so that each column, each row,
and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9.
this app leads u from beginner to guru, have fun.


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Features
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1. various difficult lev from easy to guru.
2. special play: zodiac and constellation.
3. intelligent hint and strategy tutorial.
4. easily scratch support.
5. deduce candidates manually and autoly.
6. multiple assume and rollback


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Functions:
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1. levels:
easy/normal/hard/expert/master/guru

2. intelligent hint:
resolve hint & tutorial

3. flexible scratch
manually scratch
auto scratch
batch auto scratch

4. assume & rollback
you can setup multple assume and rollback when u want to,
it will restore to what it was just before u do that assume.

5. multiple skins

6. tutorial from easy to hard

7. online rank