Official NHA Assessment

Race 4: INTERBET MIDDLE STAKES (F & M) (For Fillies and Mares with a nett rating of 102 & below)

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Line Horse
Goodnessgraciousme
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
1 / 8
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    Swiatek              3    57.0    1    0.00     0.5   90    87           87    -3
2    Kamchatka            3    58.5    2    0.10     0.5   93    90           90    -3
3    Goodnessgraciousme   2    57.0    3    2.35     0.0   90    90           90    +0
4    Fun Zone             5    60.0    4    2.40     0.0   96    96           96    +0
5    La Divina            4    52.5    5    2.60     0.5   77    80           80    +3
6    Miraculous           3    54.0    6    4.60     0.5   83    81           81    -2
7    Glee Club            2    52.5    7    8.35     0.0   77    79           79    +2
99   Rikkitikkitavi       3    52.5    99   0.00     0.5   -     78           78    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Swiatek 90 104 87 +17 0.5 -
2 Kamchatka 93 93 90 +3 0.5 -
3 Goodnessgraciousme Line 90 86 90 -4 0.0
4 Fun Zone 96 96 96 ✓ Match 0.0 -
5 La Divina 77 77 80 -3 0.5 -
6 Miraculous 83 79 81 -2 0.5 -
7 Glee Club 77 76 79 -3 0.0 -
99 Rikkitikkitavi - 77 78 -1 0.5 -
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