Official NHA Assessment

Race 2: 4RACING.TV OPEN MAIDEN (F & M) (For Maidens F&M. R15 000 Win bonus ROA Members)

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Line Horse
Principessa Mia
Reference for assessment
Exact Matches
2 / 6
Calculated = Official
Close Matches
3 / 6
Within 2 points
Significant Diffs
2 / 6
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    Mediteraneangoddes   4    61.0    1    0.00     2.0   66    66           66    +0
2    Principessa Mia      3    57.0    2    0.25     1.5   59    59           59    +0
3    Swiftwinged          2    58.0    3    5.50     0.5   -     63           63    +63
4    Misava               3    56.0    4    8.00     1.5   55    57           57    +2
5    Captivate            2    58.0    5    8.10     0.5   -     63           63    +63
6    Time For Katie       2    58.5    6    12.10    0.5   -     64           64    +64
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mediteraneangoddes 66 58 66 -8 2.0 -
2 Principessa Mia Line 59 59 59 ✓ Match 1.5
3 Swiftwinged - 62 63 -1 0.5 -
4 Misava 55 53 57 -4 1.5 -
5 Captivate - 63 63 ✓ Match 0.5 -
6 Time For Katie - 52 64 -12 0.5 -
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