Official NHA Assessment

Race 1: TRANSVAAL INTERCONSTITUTIONAL MASONIC CHARITIES MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)

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Line Horse
Duchess Of Paloma
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
6 / 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 Blunt           2    58.0    1    0.00     0.0   77    83           83    +6
2    Duchess Of Paloma    3    60.0    2    0.25     8.0   71    71           71    +0
3    Winds Of Grace       3    58.5    3    0.75     8.0   72    72           72    +0
4    Delaware River       2    58.0    4    0.95     0.0   73    87           87    +14
5    Top Shelf Teddy      2    58.0    5    1.55     0.0   -     86           86    +86
6    Stone Of Scone       2    58.0    6    3.25     0.0   79    85           85    +6
7    Phuthi               2    58.0    7    5.75     0.0   74    83           83    +9
8    Flightlight          3    56.0    8    5.80     8.0   66    63           63    -3
9    Spiranac             3    58.0    9    6.00     8.0   -     67           67    +67
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Lady Blunt 77 88 83 +5 0.0 -
2 Duchess Of Paloma Line 71 91 71 +20 8.0
3 Winds Of Grace 72 72 72 ✓ Match 8.0 -
4 Delaware River 73 77 87 -10 0.0 -
5 Top Shelf Teddy - 80 86 -6 0.0 -
6 Stone Of Scone 79 72 85 -13 0.0 -
7 Phuthi 74 72 83 -11 0.0 -
8 Flightlight 66 61 63 -2 8.0 -
9 Spiranac - 54 67 -13 8.0 -
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