Official NHA Assessment

Race 1: GARY MANN ESTATES MAIDEN PLATE (For all Maidens)

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Line Horse
Midnight Flyer
Reference for assessment
Exact Matches
2 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
3 / 7
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    Alpha World          2    60.0    1    0.00     6.5   80    6            6     -74
2    Midnight Flyer       3    60.0    2    1.80     9.5   -     -            -     +0
3    Stone Of Scone       2    57.5    3    2.80     6.5   79    1            69    -10
4    Boom Town            3    60.0    4    3.90     9.5   -     -            -     +0
5    Nebraska             3    60.0    5    6.40     9.5   -     -            -     +0
6    Himitsu              3    60.0    6    16.15    9.5   -     -            -     +0
99   Actuary              3    60.0    99   0.00     9.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Alpha World 80 87 6 +81 6.5 -
2 Midnight Flyer Line - 85 - +85 9.5
3 Stone Of Scone 79 72 69 +3 6.5 -
4 Boom Town - - - ✓ Match 9.5 -
5 Nebraska - 72 - +72 9.5 -
6 Himitsu - - - ✓ Match 9.5 -
99 Actuary - 76 - - 9.5 -
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