Official NHA Assessment

Race 3: TAB4RACING APP MAIDEN PLATE (3 year-olds) (For Maiden 3 year-olds)

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Line Horse
Heathcliff
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
8 / 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    Indy View            2    60.0    1    0.00     0.0   79    77           77    -2
2    Heathcliff           2    60.0    2    0.10     0.0   77    77           77    +0
3    Douglas Devastator   2    60.0    3    4.10     0.0   69    78           78    +9
4    Law Court            3    60.0    4    4.20     8.5   -     61           61    +61
5    Hey Siri             2    57.0    5    4.30     0.0   63    71           71    +8
6    Prince Of Heaven     2    60.0    6    7.55     0.0   65    77           77    +12
7    Twice A Saint        2    60.0    7    8.05     0.0   61    77           77    +16
8    Global Gunner        2    60.0    8    8.15     0.0   64    77           77    +13
9    American Dazzler     2    60.0    9    10.40    0.0   63    77           77    +14
10   Perfection           3    60.0    10   13.15    8.5   -     60           60    +60
11   Green Ginger         2    57.0    11   99.99    0.0   37    71           71    +34
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Indy View 79 76 77 -1 0.0 -
2 Heathcliff Line 77 100 77 +23 0.0
3 Douglas Devastator 69 64 78 -14 0.0 -
4 Law Court - 65 61 +4 8.5 -
5 Hey Siri 63 70 71 -1 0.0 -
6 Prince Of Heaven 65 58 77 -19 0.0 -
7 Twice A Saint 61 64 77 -13 0.0 -
8 Global Gunner 64 59 77 -18 0.0 -
9 American Dazzler 63 59 77 -18 0.0 -
10 Perfection - 103 60 +43 8.5 -
11 Green Ginger 37 37 71 -34 0.0 -
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