Official NHA Assessment

Race 1: MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Zambezi Sunset
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
5 / 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    Winchester           2    60.0    1    0.00     5.0   74    60           60    -14
2    Zambezi Sunset       2    60.0    2    5.00     5.0   60    60           60    +0
3    Exodus Song          2    58.5    3    9.00     5.0   48    57           57    +9
4    Firefly Lane         2    57.5    4    10.00    5.0   -     55           55    +55
5    Battlecat            3    60.0    5    22.00    7.5   -     55           55    +55
99   Head And Heart       2    60.0    99   0.00     5.0   -     60           60    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Winchester 74 69 60 +9 5.0 -
2 Zambezi Sunset Line 60 60 60 ✓ Match 5.0
3 Exodus Song 48 43 57 -14 5.0 -
4 Firefly Lane - 44 55 -11 5.0 -
5 Battlecat - - 55 -55 7.5 -
99 Head And Heart - 48 60 -12 5.0 -
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