Official NHA Assessment

Race 6: TAB 4RACING APP FM 70 HANDICAP (F & M) (Fillies and Mares)

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Line Horse
Miss Shaivi
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
7 / 11
Within 2 points
Significant Diffs
1 / 11
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    Blue Palace          2    58.5    1    0.00     0.0   69    65           69    +0
2    Greenlight Dancer    2    60.0    2    1.25     0.0   72    72           72    +0
3    Miss Shaivi          4    60.0    3    1.50     0.5   70    70           70    +0
4    Colorama             6    53.0    4    3.50     0.0   56    55           55    -1
5    Alado's Habit        3    60.0    5    4.50     0.5   72    67           67    -5
6    Duellona             2    54.5    6    4.75     0.0   67    57           57    -10
7    Iqembulabesifazane   3    59.5    7    5.00     0.5   69    66           66    -3
8    Bretty               3    55.0    8    5.50     0.5   62    57           57    -5
9    Courageous           4    59.0    9    8.00     0.5   68    65           65    -3
10   Perfect Trust        7    49.5    10   8.10     0.0   50    47           47    -3
11   Thread Of Life       3    57.5    11   8.20     0.5   67    62           62    -5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Blue Palace 69 69 69 ✓ Match 0.0 -
2 Greenlight Dancer 72 65 72 -7 0.0 -
3 Miss Shaivi Line 70 68 70 -2 0.5
4 Colorama 56 54 55 -1 0.0 -
5 Alado's Habit 72 68 67 +1 0.5 -
6 Duellona 67 58 57 +1 0.0 -
7 Iqembulabesifazane 69 65 66 -1 0.5 -
8 Bretty 62 60 57 +3 0.5 -
9 Courageous 68 62 65 -3 0.5 -
10 Perfect Trust 50 50 47 +3 0.0 -
11 Thread Of Life 67 62 62 ✓ Match 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