Official NHA Assessment

Race 7: CELEBRATING CENTURION MEMBER DEVIN HEFFER'S BIRTHDAY C STAKES (For All Horses with a nett rating of 83 & below)

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Line Horse
Umfula
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 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    Kwite A King         4    61.5    1    0.00     1.5   77    86           83    +6
2    Twice The Master     3    51.0    2    0.10     4.5   55    59           59    +4
3    Heliotrope           3    57.5    3    0.85     4.5   75    78           78    +3
4    Umfula               3    61.5    4    1.15     4.5   86    86           86    +0
5    Tothemoonandback     5    57.0    5    1.20     0.0   69    86           86    +17
6    Wood World           3    57.0    6    2.45     4.5   78    75           75    -3
7    Sansa Stark          4    53.0    7    2.75     1.5   67    72           72    +5
8    Bounceback           2    61.5    8    4.25     0.0   85    91           91    +6
99   Etoilefillante       4    51.0    99   0.00     1.5   -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Kwite A King 77 79 83 -4 1.5 -
2 Twice The Master 55 58 59 -1 4.5 -
3 Heliotrope 75 67 78 -11 4.5 -
4 Umfula Line 86 83 86 -3 4.5
5 Tothemoonandback 69 69 86 -17 0.0 -
6 Wood World 78 74 75 -1 4.5 -
7 Sansa Stark 67 63 72 -9 1.5 -
8 Bounceback 85 80 91 -11 0.0 -
99 Etoilefillante - 51 65 -14 1.5 -
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