Official NHA Assessment

Race 6: WILGERBOSDRIFT SA FILLIES CLASSIC (Grade 1) (3yof (2nd Leg Wilgerbosdrift SA Triple Tiara))

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Line Horse
Feather Boa
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
10 / 12
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Bless My Stars       2    60.0    1    0.00     0.0   103   108          108   +5
2    Feather Boa          2    60.0    2    0.05     0.0   108   108          108   +0
3    None Other           5    60.0    3    2.25     0.0   101   111          111   +10
4    Silver Hills         3    60.0    4    4.25     4.5   93    100          100   +7
5    Lady Of Power        2    60.0    5    4.75     0.0   109   108          108   -1
6    Reny                 2    60.0    6    6.00     0.0   106   108          108   +2
7    Gimmealight          3    60.0    7    8.00     4.5   87    99           99    +12
8    Bonete               3    60.0    8    9.00     4.5   97    99           99    +2
9    Emirate Gina         2    60.0    9    12.00    0.0   105   108          108   +3
10   Mighty Goddess       2    60.0    10   22.00    0.0   78    108          108   +30
11   Orarari Gold         2    60.0    11   99.99    0.0   101   108          108   +7
99   Pomozelous           3    60.0    99   0.00     4.5   -     99           99    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bless My Stars 103 119 108 +11 0.0 -
2 Feather Boa Line 108 114 108 +6 0.0
3 None Other 101 115 111 +4 0.0 -
4 Silver Hills 93 108 100 +8 4.5 -
5 Lady Of Power 109 100 108 -8 0.0 -
6 Reny 106 91 108 -17 0.0 -
7 Gimmealight 87 77 99 -22 4.5 -
8 Bonete 97 85 99 -14 4.5 -
9 Emirate Gina 105 103 108 -5 0.0 -
10 Mighty Goddess 78 73 108 -35 0.0 -
11 Orarari Gold 101 101 108 -7 0.0 -
99 Pomozelous - 62 99 -37 4.5 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points