<!DOCTYPE ksudoku-graph>
<ksudoku-graph>
 <graph sizeX="21" sizeY="21" sizeZ="1" ncliques="131" order="9" specific-type="Sohei" type="custom" name="Sohei" >

  <sudokugroups at="126" withblocks="1" /> <!-- Top square -->

  <sudokugroups at="6"   withblocks="1" /> <!-- Left-hand square -->

  <sudokugroups at="258" withblocks="1" /> <!-- Right-hand square -->

  <sudokugroups at="138" withblocks="1" /> <!-- Bottom square -->

 </graph>
</ksudoku-graph>
