Official NHA Assessment

Race 4: RACEHORSE OWNERS ASSOCIATION MR 104 HANDICAP (Open)

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Line Horse
Sister Light
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
5 / 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    Duke Of Sussex       4    57.5    1    0.00     0.5   99    98           99    +0
2    Flashy Apache        6    55.0    2    0.40     0.0   94    99           99    +5
3    Sister Light         3    53.0    3    1.50     1.5   90    90           90    +0
4    Ocean Warrior        3    58.0    4    2.50     1.5   100   99           99    -1
5    Vanderbilt           3    60.0    5    2.55     1.5   104   103          103   -1
6    Argo Alley           2    56.0    6    4.00     0.0   99    97           97    -2
7    Prophet              2    59.5    7    8.50     0.0   106   103          103   -3
99   Diesel And Dust      4    55.5    99   0.00     0.5   -     94           94    +0
99   Indlamu              4    57.5    99   0.00     0.5   -     98           98    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Duke Of Sussex 99 96 99 -3 0.5 -
2 Flashy Apache 94 78 99 -21 0.0 -
3 Sister Light Line 90 96 90 +6 1.5
4 Ocean Warrior 100 95 99 -4 1.5 -
5 Vanderbilt 104 103 103 ✓ Match 1.5 -
6 Argo Alley 99 110 97 +13 0.0 -
7 Prophet 106 66 103 -37 0.0 -
99 Diesel And Dust - 95 94 +1 0.5 -
99 Indlamu - 86 98 -12 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