Official NHA Assessment

Race 7: RACEHORSE OWNERS ASSOCIATION GRADUATION PLATE (3-year-old Fillies) (Maidens, 1 & 2 time winners for 3yr old fillies)

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Line Horse
Orarari Gold
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 7
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    Orarari Gold         2    57.0    1    0.00     6.5   101   101          101   +0
2    Feather Boa          2    60.0    2    0.70     6.5   99    107          107   +8
3    Typeset              2    57.0    3    1.50     6.5   93    101          101   +8
4    Glittering Girl      2    57.0    4    5.90     6.5   114   101          104   -10
5    Rockets Red Glare    3    57.0    5    8.65     9.5   97    95           95    -2
6    Daisy Buchanan       2    56.5    6    10.90    6.5   82    100          100   +18
99   Blindedbythelights   2    57.0    99   0.00     6.5   -     101          101   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Orarari Gold Line 101 101 101 ✓ Match 6.5
2 Feather Boa 99 114 107 +7 6.5 -
3 Typeset 93 94 101 -7 6.5 -
4 Glittering Girl 114 114 104 +10 6.5 -
5 Rockets Red Glare 97 88 95 -7 9.5 -
6 Daisy Buchanan 82 74 100 -26 6.5 -
99 Blindedbythelights - 51 101 -50 6.5 -
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