Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Pink Diamond
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
4 / 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    Godfather            2    60.0    1    0.00     0.0   66    67           67    +1
2    Pink Diamond         6    57.0    2    0.10     0.0   61    61           61    +0
3    Broadway             4    60.0    3    3.00     0.5   62    68           68    +6
4    Master Of Defense    3    60.0    4    3.05     2.0   58    65           65    +7
5    King's Express       3    60.0    5    3.25     2.0   -     65           65    +65
6    All Black Captain    3    60.0    6    7.50     2.0   46    63           63    +17
7    I'm A Man            2    60.0    7    7.75     0.0   71    67           67    -4
8    Spring Of Elixir     3    57.0    8    10.00    2.0   62    57           57    -5
9    Insightful           3    60.0    9    11.75    2.0   65    63           63    -2
10   Us Open              3    60.0    10   17.00    2.0   68    63           63    -5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Godfather 66 57 67 -10 0.0 -
2 Pink Diamond Line 61 60 61 -1 0.0
3 Broadway 62 59 68 -9 0.5 -
4 Master Of Defense 58 63 65 -2 2.0 -
5 King's Express - 102 65 +37 2.0 -
6 All Black Captain 46 55 63 -8 2.0 -
7 I'm A Man 71 69 67 +2 0.0 -
8 Spring Of Elixir 62 55 57 -2 2.0 -
9 Insightful 65 60 63 -3 2.0 -
10 Us Open 68 60 63 -3 2.0 -
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