Official NHA Assessment

Race 3: SA DERBY 4 APRIL MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Lanteri
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
4 / 8
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    Onceinabluemoon      2    58.5    1    0.00     0.0   72    77           77    +5
2    The Reason           3    60.0    2    2.20     3.0   74    77           77    +3
3    Lanteri              3    57.5    3    2.80     3.0   71    71           71    +0
4    Erik's Girl          2    57.5    4    3.00     0.0   53    77           77    +24
5    Savara's Princess    2    60.0    5    4.00     0.0   71    81           81    +10
6    Baby Red             2    60.0    6    10.00    0.0   67    80           80    +13
7    Amaze Me             2    60.0    7    11.30    0.0   64    80           80    +16
99   Trip Of Faith        3    60.0    99   0.00     3.0   -     74           74    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Onceinabluemoon 72 75 77 -2 0.0 -
2 The Reason 74 73 77 -4 3.0 -
3 Lanteri Line 71 69 71 -2 3.0
4 Erik's Girl 53 67 77 -10 0.0 -
5 Savara's Princess 71 67 81 -14 0.0 -
6 Baby Red 67 65 80 -15 0.0 -
7 Amaze Me 64 64 80 -16 0.0 -
99 Trip Of Faith - 79 74 +5 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