Official NHA Assessment

Race 6: GREYVILLE CONVENTION CENTRE FM 69 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Royal Kitty
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
3 / 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    Gin And Tonic        3    57.5    1    0.00     4.0   64    53           64    +0
2    Royal Kitty          5    59.0    2    2.20     0.0   67    67           67    +0
3    Cataleya Summer      2    56.0    3    2.45     0.0   70    60           60    -10
4    Forged In Ice        3    56.5    4    3.45     4.0   67    52           57    -10
5    Arctic Princess      5    60.0    5    4.65     0.0   69    66           66    -3
6    Green Dream          5    59.5    6    5.95     0.0   68    65           65    -3
7    Badrah (AUS)         4    53.0    7    7.45     2.5   55    47           47    -8
8    Belle Rouge          3    60.0    8    14.35    4.0   69    58           59    -10
99   Vihzoe's Magic       4    58.5    99   0.00     2.5   -     58           58    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gin And Tonic 64 68 64 +4 4.0 -
2 Royal Kitty Line 67 66 67 -1 0.0
3 Cataleya Summer 70 74 60 +14 0.0 -
4 Forged In Ice 67 57 57 ✓ Match 4.0 -
5 Arctic Princess 69 66 66 ✓ Match 0.0 -
6 Green Dream 68 60 65 -5 0.0 -
7 Badrah (AUS) 55 56 47 +9 2.5 -
8 Belle Rouge 69 58 59 -1 4.0 -
99 Vihzoe's Magic - 72 58 +14 2.5 -
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