Official NHA Assessment

Race 5: MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Ian's Ferrari
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
5 / 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    Ian's Ferrari        3    57.0    1    0.00     5.0   60    60           60    +0
2    Apache Gold          3    60.0    2    2.00     5.0   63    69           69    +6
3    Queen Of Dallas      3    57.0    3    2.05     5.0   55    63           63    +8
4    Karoo Winter         4    53.0    4    2.55     2.5   41    59           59    +18
5    Chetan               3    57.0    5    6.55     5.0   48    60           60    +12
6    Gold Collection      3    60.0    6    11.55    5.0   54    66           66    +12
99   King Magnus          3    56.0    99   0.00     5.0   -     58           58    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ian's Ferrari Line 60 63 60 +3 5.0
2 Apache Gold 63 52 69 -17 5.0 -
3 Queen Of Dallas 55 40 63 -23 5.0 -
4 Karoo Winter 41 56 59 -3 2.5 -
5 Chetan 48 45 60 -15 5.0 -
6 Gold Collection 54 50 66 -16 5.0 -
99 King Magnus - 22 58 -36 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