Official NHA Assessment

Race 6: GREYVILLE CONVENTION CENTRE FM 67 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Bright Star
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
8 / 11
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    Star Choice          5    61.0    1    0.00     0.0   69    84           69    +0
2    Poppy Of Bayeux      3    56.5    2    0.40     5.0   60    65           65    +5
3    Bright Star          2    57.0    3    1.45     3.5   69    69           69    +0
4    Flying The Star      4    54.0    4    2.15     6.0   58    58           58    +0
5    Birdwatcher          5    55.0    5    4.85     0.0   57    72           72    +15
6    Stealth Attack       2    55.5    6    4.95     3.5   58    66           66    +8
7    Quentasia            4    57.0    7    8.45     6.0   76    64           66    -10
8    Maggie Tee           3    54.0    8    9.15     5.0   55    60           60    +5
9    Blush Of Dawn        8    57.5    9    9.45     0.0   62    77           77    +15
99   French Princess      2    59.0    99   0.00     3.5   -     73           73    +0
99   Swiss Paradise       3    54.0    99   0.00     5.0   -     60           60    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Star Choice 69 77 69 +8 0.0 -
2 Poppy Of Bayeux 60 57 65 -8 5.0 -
3 Bright Star Line 69 69 69 ✓ Match 3.5
4 Flying The Star 58 67 58 +9 6.0 -
5 Birdwatcher 57 53 72 -19 0.0 -
6 Stealth Attack 58 52 66 -14 3.5 -
7 Quentasia 76 58 66 -8 6.0 -
8 Maggie Tee 55 55 60 -5 5.0 -
9 Blush Of Dawn 62 64 77 -13 0.0 -
99 French Princess - 65 73 -8 3.5 -
99 Swiss Paradise - 60 60 ✓ Match 5.0 -
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