Official NHA Assessment

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

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Line Horse
American Rebel
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
8 / 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    American Rebel       4    60.0    1    0.00     0.5   72    72           72    +0
2    The Cane Train       3    56.0    2    1.75     1.0   -     66           66    +66
3    Quelimane            2    56.0    3    6.00     0.0   -     65           65    +65
4    Duchess Of Seville   4    57.5    4    6.20     0.5   70    67           67    -3
5    Breath Of Magic      4    60.0    5    8.20     0.5   68    72           72    +4
6    Ambitious Lady       3    57.5    6    9.10     1.0   66    66           66    +0
7    Brightest Blaze      3    60.0    7    10.10    1.0   46    71           71    +25
8    Gold De Grace        4    60.0    8    10.75    0.5   52    72           72    +20
9    Rampear              2    60.0    9    15.50    0.0   -     73           73    +73
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 American Rebel Line 72 81 72 +9 0.5
2 The Cane Train - 81 66 +15 1.0 -
3 Quelimane - 73 65 +8 0.0 -
4 Duchess Of Seville 70 53 67 -14 0.5 -
5 Breath Of Magic 68 60 72 -12 0.5 -
6 Ambitious Lady 66 62 66 -4 1.0 -
7 Brightest Blaze 46 43 71 -28 1.0 -
8 Gold De Grace 52 51 72 -21 0.5 -
9 Rampear - 45 73 -28 0.0 -
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