Official NHA Assessment

Race 4: CENTENARY CLUB OPEN MAIDEN (F & M) (For all Maiden Fillies & Mares)

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Line Horse
Spirit Of Nical
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
5 / 9
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    Lady Orbit           3    55.5    1    0.00     3.0   64    61           61    -3
2    Giddy Up Grace       2    49.5    2    0.40     0.0   60    60           60    +0
3    Spirit Of Nical      3    59.5    3    2.15     3.0   72    72           72    +0
4    Vixens War           2    58.0    4    2.20     0.0   69    75           75    +6
5    Nicci's Law          2    57.0    5    2.50     0.0   67    72           72    +5
6    Pacific Waters       2    61.5    6    3.50     0.0   76    80           80    +4
7    Fate Of Pace         3    56.5    7    6.25     3.0   60    63           63    +3
8    Kituba               3    60.5    8    7.75     3.0   -     71           71    +71
9    Island Jewel         2    52.5    9    11.50    0.0   54    61           61    +7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Lady Orbit 64 69 61 +8 3.0 -
2 Giddy Up Grace 60 63 60 +3 0.0 -
3 Spirit Of Nical Line 72 72 72 ✓ Match 3.0
4 Vixens War 69 69 75 -6 0.0 -
5 Nicci's Law 67 66 72 -6 0.0 -
6 Pacific Waters 76 73 80 -7 0.0 -
7 Fate Of Pace 60 58 63 -5 3.0 -
8 Kituba - 67 71 -4 3.0 -
9 Island Jewel 54 51 61 -10 0.0 -
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