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 2013 League Champions - Henderson Red (SNLL) and Galena (HSLL )
     
  
  
   
Rank Team                    Total  SOS Ave   SOS Wt Ave  SOS RPI    W  L  T
                             Games Rnk Value  Rnk Value  Rnk Value
 
   1 Palo Verde                23   1  86.73   1  71.53   1   0.60  17  6  0
   2 Centennial                22   2  85.44   2  69.17   4   0.55  11 11  0
   3 Henderson Red             19   3  83.89   3  65.83   3   0.58  18  1  0
   4 Faith Lutheran            18   4  83.78   4  65.62   2   0.58  12  6  0
   5 Red Rock                  11   5  82.09   5  62.48   6   0.53   1 10  0
   6 Galena                    16   6  79.94   7  57.98   8   0.51  14  2  0
   7 Henderson Blue            14   7  79.61   6  58.10  11   0.48   6  8  0
   8 Green Valley              14   8  79.35   8  57.61  12   0.46   7  7  0
   9 Bishop Manogue             9   9  78.84   9  55.91   5   0.53   3  6  0
  10 Spanish Springs           10  10  78.64  11  55.35   9   0.49   1  9  0
  11 High Sierra-Reno          10  11  78.17  13  54.70   7   0.52   5  5  0
  12 Bishop Gorman             13  12  78.10  10  55.70  13   0.43   6  7  0
  13 Spring Valley             14  13  77.81  12  54.80  14   0.40   2 12  0
  14 McQueen                   11  14  77.44  14  53.36  10   0.48   4  5  0
  15 Venom LC                   6  15  71.31  15  43.33  15   0.27   1  5  0
  16 Arbor View                 0   0   0.00   0   0.00   0   0.00   0  0  0