Official NHA Assessment

Race 4: CELEBRATING CENTURION MEMBER PIETER GRAAFF'S BIRTHDAY MAIDEN PLATE (For all Maidens)

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Line Horse
Wood World
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
5 / 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    Ahead Of The Facts   3    60.0    1    0.00     5.0   78    73           73    -5
2    Umfula               3    60.0    2    1.25     5.0   76    79           79    +3
3    Wood World           3    60.0    3    1.65     5.0   78    78           78    +0
4    Jet A One            2    60.0    4    5.65     0.0   70    83           83    +13
5    Darling Girl         2    57.0    5    8.40     0.0   63    77           77    +14
6    Future Frequency     3    60.0    6    10.90    5.0   83    73           73    -10
7    Rock Of Eye          3    60.0    7    12.65    5.0   59    73           73    +14
8    Johnny Drama         3    60.0    8    12.70    5.0   66    73           73    +7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ahead Of The Facts 78 110 73 +37 5.0 -
2 Umfula 76 83 79 +4 5.0 -
3 Wood World Line 78 74 78 -4 5.0
4 Jet A One 70 69 83 -14 0.0 -
5 Darling Girl 63 54 77 -23 0.0 -
6 Future Frequency 83 83 73 +10 5.0 -
7 Rock Of Eye 59 57 73 -16 5.0 -
8 Johnny Drama 66 78 73 +5 5.0 -
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