Sample Solution – Step 1

 

The example, below, is a typical “FIENDISH  rated Su Doku.

 

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To solve this, quickly, using the SU DO KU function, first set the “No. of Recursions” to 20 to attempt to solve it in one go.

Press the  SU DO KU button. Click here for next step.

 

Click Here to return to main screen

 

Click Here register the advanced SU DO KU function