Official NHA Assessment

Race 1: #THISISRACING WELCOMES YOU MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Aga Heat
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    Rio's Kiss           3    60.0    1    0.00     4.5   -     -            -     +0
2    Aga Heat             3    60.0    2    0.05     4.5   -     -            -     +0
3    Mandalay             3    57.5    3    0.35     4.5   -     -5           -     +0
4    Special Variety      3    60.0    4    3.85     4.5   -     -            -     +0
5    I Am Royal           3    60.0    5    4.75     4.5   57    -            53    -4
6    Stormy Lass          3    60.0    6    9.25     4.5   -     -            -     +0
7    Mercurial Jet        3    60.0    7    10.00    4.5   -     -            -     +0
8    Grecia               3    60.0    8    10.25    4.5   -     -            -     +0
99   Spanish Spirit       3    60.0    99   0.00     4.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rio's Kiss - 52 - +52 4.5 -
2 Aga Heat Line - 74 - +74 4.5
3 Mandalay - 53 - +53 4.5 -
4 Special Variety - 74 - +74 4.5 -
5 I Am Royal 57 60 53 +7 4.5 -
6 Stormy Lass - 61 - +61 4.5 -
7 Mercurial Jet - 59 - +59 4.5 -
8 Grecia - 53 - +53 4.5 -
99 Spanish Spirit - - - - 4.5 -
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