Official NHA Assessment

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

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Line Horse
Queen Of Dallas
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 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    Midfield Girl        3    56.5    1    0.00     3.5   64    59           59    -5
2    Bruce's Spirit       6    60.0    2    2.50     0.0   46    77           77    +31
3    Queen Of Dallas      3    54.0    3    12.50    3.5   54    54           54    +0
4    Apache Gold          3    56.0    4    15.00    3.5   60    58           58    -2
5    Ginjamatinja         3    60.0    5    26.00    3.5   56    66           66    +10
6    King Magnus          3    60.0    6    29.00    3.5   -     66           66    +66
7    Cosmic Rush          3    60.0    7    99.99    3.5   38    66           66    +28
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Midfield Girl 64 59 59 ✓ Match 3.5 -
2 Bruce's Spirit 46 55 77 -22 0.0 -
3 Queen Of Dallas Line 54 40 54 -14 3.5
4 Apache Gold 60 52 58 -6 3.5 -
5 Ginjamatinja 56 45 66 -21 3.5 -
6 King Magnus - 22 66 -44 3.5 -
7 Cosmic Rush 38 28 66 -38 3.5 -
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