Official NHA Assessment

Race 7: TAB 4RACING APP CLASSIFIED STAKES (For horses with nett rating of 71 and below)

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Line Horse
Silver Stardust
Reference for assessment
Exact Matches
3 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
4 / 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    Berengaria           2    54.0    1    0.00     0.0   80    66           66    -14
2    Silver Stardust      4    58.0    2    2.70     6.0   64    64           64    +0
3    Southern Blaze       3    60.0    3    3.10     8.5   71    63           63    -8
4    Run For Isla         3    58.0    4    7.10     8.5   71    57           61    -10
5    Full Royalty         3    52.0    5    8.30     8.5   54    45           45    -9
6    Paschals Samore      5    52.0    6    8.50     0.0   53    62           62    +9
7    Sacred Valley        3    52.5    7    9.10     8.5   63    46           53    -10
8    My Master            3    58.0    8    9.30     8.5   67    57           57    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Berengaria 80 79 66 +13 0.0 -
2 Silver Stardust Line 64 64 64 ✓ Match 6.0
3 Southern Blaze 71 89 63 +26 8.5 -
4 Run For Isla 71 58 61 -3 8.5 -
5 Full Royalty 54 54 45 +9 8.5 -
6 Paschals Samore 53 62 62 ✓ Match 0.0 -
7 Sacred Valley 63 44 53 -9 8.5 -
8 My Master 67 57 57 ✓ Match 8.5 -
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