Official NHA Assessment

Race 4: RACEHORSE OWNERS ASSOCIATION MAIDEN PLATE (3-year-old Fillies) (For Maiden 3-year-old Fillies)

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Line Horse
A Colourful Past
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 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    A Colourful Past     2    60.0    1    0.00     0.0   75    75           75    +0
2    Countess Danza       5    60.0    2    0.70     0.0   67    80           80    +13
3    Greenlightranger     3    60.0    3    0.90     9.0   -     61           61    +61
4    Maith An Cailin      2    60.0    4    3.25     0.0   -     77           77    +77
5    Street's Ahead       2    60.0    5    3.50     0.0   50    76           76    +26
6    Kungfoo Lightning    2    60.0    6    7.00     0.0   -     75           75    +75
7    Countess Of Peace    2    60.0    7    8.25     0.0   -     75           75    +75
8    Elusive Madame       2    60.0    8    9.75     0.0   -     75           75    +75
99   Kit Kat Katie        2    60.0    99   0.00     0.0   -     75           75    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 A Colourful Past Line 75 66 75 -9 0.0
2 Countess Danza 67 51 80 -29 0.0 -
3 Greenlightranger - 63 61 +2 9.0 -
4 Maith An Cailin - 68 77 -9 0.0 -
5 Street's Ahead 50 55 76 -21 0.0 -
6 Kungfoo Lightning - 38 75 -37 0.0 -
7 Countess Of Peace - 52 75 -23 0.0 -
8 Elusive Madame - 57 75 -18 0.0 -
99 Kit Kat Katie - 60 75 -15 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