Official NHA Assessment

Race 4: GREYVILLE CONVENTION CENTRE FM 68 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Thesupernovastar
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 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    Doctor's Orders      2    60.0    1    0.00     0.0   70    92           70    +0
2    English Primrose     3    54.5    2    1.10     9.5   57    68           68    +11
3    Thesupernovastar     3    49.5    3    3.90     9.5   54    54           54    +0
4    Canford Queen        3    60.5    4    4.70     9.5   71    75           75    +4
5    Lady Is A Champ      2    56.0    5    6.60     0.0   60    84           84    +24
6    Top Ten              4    48.0    6    6.85     6.0   50    56           56    +6
7    Roy's Rocker         3    56.5    7    7.35     9.5   61    66           66    +5
8    Free Will            3    48.0    8    11.95    9.5   50    49           49    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Doctor's Orders 70 79 70 +9 0.0 -
2 English Primrose 57 58 68 -10 9.5 -
3 Thesupernovastar Line 54 56 54 +2 9.5
4 Canford Queen 71 59 75 -16 9.5 -
5 Lady Is A Champ 60 57 84 -27 0.0 -
6 Top Ten 50 50 56 -6 6.0 -
7 Roy's Rocker 61 53 66 -13 9.5 -
8 Free Will 50 49 49 ✓ Match 9.5 -
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