Official NHA Assessment

Race 7: GREYVILLE CONVENTION CENTRE FM 83 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Lady Catherine
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
2 / 9
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    Aunty Lizzy          3    57.0    1    0.00     3.0   84    81           84    +0
2    Lady Catherine       4    59.0    2    2.60     3.5   84    84           84    +0
3    Indigo Fields        3    57.0    3    4.90     3.0   81    81           81    +0
4    Pelargonium          3    58.5    4    6.00     3.0   84    84           84    +0
5    Varvacious           4    61.5    5    7.50     3.5   86    89           89    +3
6    Civil Rights         3    58.0    6    9.60     3.0   83    83           83    +0
7    Retail Therapy       5    58.5    7    10.90    0.0   80    90           90    +10
8    Nikiya               6    59.5    8    25.70    0.0   82    92           92    +10
99   Irish Belle          4    58.5    99   0.00     3.5   -     83           83    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Aunty Lizzy 84 84 84 ✓ Match 3.0 -
2 Lady Catherine Line 84 88 84 +4 3.5
3 Indigo Fields 81 77 81 -4 3.0 -
4 Pelargonium 84 84 84 ✓ Match 3.0 -
5 Varvacious 86 85 89 -4 3.5 -
6 Civil Rights 83 88 83 +5 3.0 -
7 Retail Therapy 80 70 90 -20 0.0 -
8 Nikiya 82 75 92 -17 0.0 -
99 Irish Belle - 80 83 -3 3.5 -
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