See Strength of Schedule for an explanation. There are three sos calculations:
the 1st averages the opponents computer rating based on
 computer margin of victory "Reg In" and "ROM", the 2nd
 is similar to the first but instead of a simple average, it
 weighs games against stronger teams more heavily, and
 the 3rd is based on the RPI SOS formula used by the NCAA. This factor is not used in the power rating calculation.
          
      
   
     
   
           
           

Use the Report Scores link for both scores and missing games.
     
  
  
   
Rank Team                    Total  SOS Ave   SOS Wt Ave  SOS RPI    W  L  T
                             Games Rnk Value  Rnk Value  Rnk Value
 
   1 Xavier College Prep       12   1  62.64   1  32.09   5   0.54   3  9  0
   2 Desert Mountain           14   2  62.35   3  31.49   3   0.55   0 14  0
   3 Horizon                   18   3  62.20   2  31.85   1   0.56  11  7  0
   4 Tempe-Corona Del Sol      15   4  61.51   4  30.97   4   0.54   7  8  0
   5 Pinnacle                  17   5  61.44   5  30.82   6   0.53  13  4  0
   6 Gilbert                   14   6  60.85   6  30.03   7   0.51   6  8  0
   7 Chaparral, AZ             18   7  60.64   7  29.50   2   0.55  18  0  0
   8 Phoenix Country Day       16   8  53.14   8  21.38   8   0.50   4 12  0
   9 Notre Dame Prep, AZ       17   9  52.05   9  20.08  10   0.49  10  7  0
  10 Chaparral Club, AZ        15  10  51.76  10  19.61  12   0.47   4 11  0
  11 Desert Vista              17  11  51.49  11  19.23   9   0.49   9  8  0
  12 Mountain Pointe           16  12  51.38  13  19.12  13   0.46   5 11  0
  13 Horizon Club              18  13  51.09  12  19.20  11   0.48  16  2  0
  14 Tucson Storm Club         13  14  50.44  14  18.17  15   0.45   4  9  0
  15 Pinnacle Club             16  15  50.39  15  18.15  14   0.45   8  8  0