Official NHA Assessment

Race 3: GREYVILLE CONVENTION CENTRE MAIDEN PLATE (For all Maidens)

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Line Horse
Duke Of Africa
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
6 / 10
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    Corsican             2    59.0    1    0.00     0.0   71    65           65    -6
2    Law Court            3    59.0    2    0.40     5.0   67    60           60    -7
3    Duke Of Africa       5    59.0    3    1.70     0.0   68    68           68    +0
4    Chasin               2    57.5    4    2.30     0.0   62    64           64    +2
5    Let Em Go            5    60.0    5    2.35     0.0   46    69           69    +23
6    Zapotec              3    59.0    6    4.95     5.0   -     55           55    +55
7    Bello Grosso         2    59.0    7    5.65     0.0   62    65           65    +3
8    Mister Lincoln       3    56.5    8    6.95     5.0   -     50           50    +50
9    Whiz Bang            2    59.0    9    21.45    0.0   56    65           65    +9
99   Alfatorio            3    59.0    99   0.00     5.0   -     55           55    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Corsican 71 61 65 -4 0.0 -
2 Law Court 67 65 60 +5 5.0 -
3 Duke Of Africa Line 68 76 68 +8 0.0
4 Chasin 62 64 64 ✓ Match 0.0 -
5 Let Em Go 46 57 69 -12 0.0 -
6 Zapotec - 51 55 -4 5.0 -
7 Bello Grosso 62 72 65 +7 0.0 -
8 Mister Lincoln - 57 50 +7 5.0 -
9 Whiz Bang 56 52 65 -13 0.0 -
99 Alfatorio - 65 55 +10 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