Official NHA Assessment

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

Back to Race
Line Horse
My Secret Place
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
3 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Kallipos             3    60.0    1    0.00     3.0   29    47           35    +6
2    Evocative            3    57.5    2    3.00     3.0   54    42           44    -10
3    My Secret Place      5    57.5    3    4.00     0.0   48    48           48    +0
4    Aratula              3    60.0    4    6.50     3.0   -     47           47    +47
5    Apache Gold          3    60.0    5    8.25     3.0   45    47           47    +2
6    Red Orchid           3    57.5    6    10.00    3.0   -     42           42    +42
7    Countess Lydia       3    57.5    7    13.00    3.0   -     42           42    +42
8    Onceajackpot         3    60.0    8    19.00    3.0   -     47           47    +47
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Kallipos 29 63 35 +28 3.0 -
2 Evocative 54 44 44 ✓ Match 3.0 -
3 My Secret Place Line 48 71 48 +23 0.0
4 Aratula - 45 47 -2 3.0 -
5 Apache Gold 45 52 47 +5 3.0 -
6 Red Orchid - 43 42 +1 3.0 -
7 Countess Lydia - 41 42 -1 3.0 -
8 Onceajackpot - 53 47 +6 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