Official NHA Assessment

Race 4: COMPUTAFORM ONLINE FM 91 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Duplicity
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
5 / 9
Within 2 points
Significant Diffs
2 / 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    Oscar's Winner       4    57.5    1    0.00     1.5   86    83           86    +0
2    Symphony Of Light    3    54.5    2    0.75     2.5   86    79           79    -7
3    Duplicity            4    58.5    3    1.50     1.5   88    88           88    +0
4    Twilight Hour        3    53.5    4    1.60     2.5   83    76           76    -7
5    Warm Welcome         3    54.5    5    2.35     2.5   86    77           77    -9
6    Daughter Of Zeus     4    56.5    6    3.60     1.5   84    82           82    -2
7    She's A Rainbow      3    60.0    7    5.10     2.5   97    86           87    -10
8    Louis' Diamond       3    55.5    8    5.60     2.5   88    77           78    -10
99   Long White Cloud (I  4    57.5    99   0.00     1.5   -     83           83    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Oscar's Winner 86 91 86 +5 1.5 -
2 Symphony Of Light 86 75 79 -4 2.5 -
3 Duplicity Line 88 87 88 -1 1.5
4 Twilight Hour 83 74 76 -2 2.5 -
5 Warm Welcome 86 86 77 +9 2.5 -
6 Daughter Of Zeus 84 82 82 ✓ Match 1.5 -
7 She's A Rainbow 97 85 87 -2 2.5 -
8 Louis' Diamond 88 58 78 -20 2.5 -
99 Long White Cloud (IRE) - 85 83 +2 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