Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Callaburn
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
6 / 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    To The Rescue        4    60.0    1    0.00     2.0   78    73           70    -8
2    Karoo Gold           3    60.0    2    0.25     4.5   77    68           68    -9
3    Callaburn            2    60.0    3    4.50     0.0   77    77           77    +0
4    Pomo Clapper         2    60.0    4    9.00     0.0   60    77           77    +17
5    Touched By Stars     5    60.0    5    9.50     0.0   61    77           77    +16
6    Sword Of Mercy       3    60.0    6    11.25    4.5   68    68           68    +0
7    Volte Face           3    60.0    7    13.25    4.5   67    68           68    +1
99   Forest God           3    60.0    99   0.00     4.5   -     68           68    +0
99   Rastignac            4    60.0    99   0.00     2.0   -     73           73    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 To The Rescue 78 82 70 +12 2.0 -
2 Karoo Gold 77 67 68 -1 4.5 -
3 Callaburn Line 77 52 77 -25 0.0
4 Pomo Clapper 60 68 77 -9 0.0 -
5 Touched By Stars 61 52 77 -25 0.0 -
6 Sword Of Mercy 68 65 68 -3 4.5 -
7 Volte Face 67 66 68 -2 4.5 -
99 Forest God - 79 68 +11 4.5 -
99 Rastignac - 58 73 -15 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