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 - Hyde Woodstock (SENE)
     
  
  
   
Rank Team                    Total  SOS Ave   SOS Wt Ave  SOS RPI    W  L  T
                             Games Rnk Value  Rnk Value  Rnk Value
 
   1 Phillips Andover          16   1  94.10   1  86.15   4   0.60  10  5  0
   2 Tabor Academy             13   2  93.55   2  85.09   1   0.63   3 10  0
   3 Phillips Exeter           19   3  93.17   3  84.20   2   0.62  13  5  0
   4 Noble & Greenough         19   4  92.99   4  83.84  12   0.55  13  5  0
   5 St Mark's                 16   5  92.93   5  83.71  14   0.54   2 13  0
   6 St Sebastian              17   6  92.52   6  82.83  11   0.55  13  4  0
   7 Thayer Academy            17   7  92.44   7  82.63  26   0.51  11  6  0
   8 Belmont Hill              16   8  92.35   8  82.40  17   0.54  14  1  0
   9 Middlesex                 15   9  92.20   9  82.09  20   0.53   9  5  0
  10 Rivers                    18  10  92.14  10  81.98  19   0.53  10  8  0
  11 Milton Academy            15  11  92.06  11  81.80  28   0.50   3 11  0
  12 St Paul's                 18  12  92.00  12  81.63  25   0.51   7 11  0
  13 Roxbury Latin             17  13  91.85  13  81.29  24   0.52  13  4  0
  14 Groton School             17  14  91.81  14  81.28  21   0.53   6 10  0
  15 Brooks School             18  15  91.63  15  80.87  22   0.52   9  9  0
  16 St George's               17  16  91.52  16  80.78  23   0.52   3 13  0
  17 The Governor's Academy    16  17  91.48  17  80.49  29   0.50  14  2  0
  18 Brewster Academy          18  18  91.38  19  80.35   5   0.58  17  1  0
  19 Kimball Union             15  19  91.35  18  80.37   8   0.57   3 12  0
  20 Lawrence Academy          18  20  91.28  20  80.15  30   0.50   2 16  0
  21 Holderness                15  21  91.17  21  80.07   7   0.57   8  7  0
  22 Dexter School             14  22  91.12  22  79.80   3   0.62   7  6  0
  23 Buckingham, B&N           17  23  90.93  23  79.42  31   0.49   5 11  0
  24 Kents Hill                 9  24  90.21  24  77.58  48   0.41   0  9  0
  25 New Hampton               14  25  89.90  25  77.36  13   0.55  10  4  0
  26 Proctor Academy           17  26  89.90  26  77.35  16   0.54   9  8  0
  27 Pomfret                   14  27  89.78  27  76.63   6   0.57  12  2  0
  28 Cushing Academy           17  28  89.55  28  76.62  15   0.54   8  9  0
  29 Tilton School             14  29  88.56  29  74.45  27   0.51   3 11  0
  30 Hebron Academy            16  30  88.07  30  73.45  35   0.47  11  5  0
  31 Hyde-Bath                 11  31  87.93  31  73.04  43   0.45   3  8  0
  32 Gould Academy             18  32  87.39  32  72.15  42   0.45  12  6  0
  33 Winchendon                13  33  86.48  33  70.54  40   0.46   4  9  0
  34 Worcester Academy         13  34  86.16  34  69.67   9   0.56   7  6  0
  35 Portsmouth Abbey          15  35  85.59  35  69.15  18   0.53  12  3  0
  36 Berwick Academy           16  36  85.20  36  68.18  34   0.47   7  9  0
  37 Pingree                   15  37  85.13  37  68.13  32   0.49   8  7  0
  38 Vermont Academy           16  38  84.94  38  68.02  37   0.47   3 13  0
  39 Hyde-Woodstock            17  39  82.45  39  62.85  10   0.56  11  5  0
  40 Beaver Country Day        14  40  80.39  40  59.00  39   0.46   7  7  0
  41 Rocky Hill                12  41  79.90  41  58.10  38   0.47   5  7  0
  42 Landmark School           13  42  78.59  43  55.71  33   0.47   3 10  0
  43 Falmouth Academy          15  43  78.56  42  55.78  36   0.47   6  9  0
  44 Lexington Christian       12  44  78.23  44  55.54  44   0.43   6  6  0
  45 Concord Academy           10  45  77.43  45  54.25  50   0.41   2  8  0
  46 Williams School           12  46  76.83  46  53.07  41   0.45   4  8  0
  47 St Andrew's                9  47  76.21  47  51.64  45   0.43   2  7  0
  48 St Thomas More            11  48  75.57  48  51.06  46   0.42   7  4  0
  49 Bancroft                  13  49  75.21  49  50.46  53   0.38   8  5  0
  50 Chapel Hill CH            12  50  72.62  50  45.33  52   0.38   0 12  0
  51 Putney School              2  51  72.54  52  44.82  58   0.01   1  1  0
  52 Marianapolis Prep          9  52  72.34  51  45.03  55   0.34   1  8  0
  53 Boston Trinity Academy    10  53  71.99  53  44.78  49   0.41   5  4  0
  54 Dublin School              6  54  71.83  54  44.69  56   0.32   2  4  0
  55 Gann Academy              11  55  71.78  55  44.26  51   0.38   4  7  0
  56 Waring School             12  56  71.35  56  43.73  47   0.42   9  3  0
  57 Brimmer & May              9  57  69.97  57  41.67  54   0.35   4  4  0
  58 Stratton Mtn School        6  58  69.56  58  40.90  57   0.08   2  4  0