Score: 24

  9 2 3 6    
  3 8 7 2    
1 4 9 6 5 1 7
9 7 5 8 4 2  
    3 1 6    

Score: 24

    9 2 3 6  
    3 8 7 2  
7 1 4 9 6 5 1
  9 7 5 8 4 2
      3 1 6  

Score: 25

  3 2 5      
  5 1 4 2   7
9 8 3 6 7 9 5
3 4 7 1 8 2 6
      9 6    
      4      

Score: 25

      8 6  
      2 5  
  7 5 1 4 2
6 9 8 3 6 7
2 3 4 7 1 8
  5 9 1    
    2      

Score: 25

    4      
  9 2 3 6  
  3 8 7 2 1
1 4 9 6 5 1
9 7 5 8 4  
    3 1 6  
      7