Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Delphi Dancer
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
7 / 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    Delphi Dancer        3    60.0    1    0.00     3.0   61    61           61    +0
2    Bellissivar          2    57.0    2    0.10     2.0   -     57           57    +57
3    Golden Argo          3    60.0    3    0.30     3.0   60    61           61    +1
4    Offer The Light      3    60.0    4    2.80     3.0   -     61           61    +61
5    Centrefold           2    60.0    5    2.85     2.0   51    63           63    +12
6    Frosted Green        3    60.0    6    4.85     3.0   -     61           61    +61
7    Mia Barca            2    60.0    7    6.60     2.0   52    63           63    +11
8    It's Up To Me        2    60.0    8    9.85     2.0   30    63           63    +33
99   Ritirata             3    60.0    99   0.00     3.0   -     61           61    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Delphi Dancer Line 61 59 61 -2 3.0
2 Bellissivar - 73 57 +16 2.0 -
3 Golden Argo 60 61 61 ✓ Match 3.0 -
4 Offer The Light - - 61 -61 3.0 -
5 Centrefold 51 47 63 -16 2.0 -
6 Frosted Green - 54 61 -7 3.0 -
7 Mia Barca 52 55 63 -8 2.0 -
8 It's Up To Me 30 45 63 -18 2.0 -
99 Ritirata - - 61 -61 3.0 -
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