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
 and uses only the top ten (rpi based) teams.
          
      
   
     
   
           
           

Congratulations to Birmingham Hoover - 2013 Alabama GBYLL State Champions
     
  
  
   
Rank Team                    Total  SOS Ave   SOS Wt Ave  SOS RPI    W  L  T
                             Games Rnk Value  Rnk Value  Rnk Value
 
   1 Spain Park                16   1  82.36   1  62.43   4   0.55  12  4  0
   2 Mountain Brook            13   2  82.29   2  61.89   1   0.57   5  8  0
   3 Birmingham-Hoover         19   3  82.00   3  61.50   2   0.56  14  5  0
   4 Oak Mountain              11   4  80.72   4  59.17   3   0.55   4  7  0
   5 Vestavia Hills            14   5  80.02   5  58.00   6   0.52  10  4  0
   6 Huntsville                14   6  79.73   6  57.23   5   0.53   4 10  0
   7 Birmingham LC             11   7  79.60   7  57.20   8   0.49   3  8  0
   8 Briarwood School           9   8  79.02   8  56.20   9   0.48   3  6  0
   9 John Carroll              15   9  79.01   9  56.18  10   0.46   9  6  0
  10 Virgil Grissom            13  10  78.83  10  55.76   7   0.49   8  5  0
  11 Bob Jones                 12  11  78.66  11  55.40  12   0.44   4  8  0
  12 Auburn                     7  12  78.44  12  55.15  11   0.44   1  6  0
  13 Altamont School            7  13  78.00  13  54.19  13   0.41   0  7  0