Official NHA Assessment

Race 8: RIDGEMONT GARDEN PROVINCE STAKES (Grade 1) (Fillies and Mares at Weight-For-Age)

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Line Horse
Princess Calla
Reference for assessment
Exact Matches
1 / 14
Calculated = Official
Close Matches
1 / 14
Within 2 points
Significant Diffs
12 / 14
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    Princess Calla       4    60.0    1    0.00     0.5   127   127          127   +0
2    Desert Miracle       3    60.0    2    1.80     1.0   124   129          129   +5
3    Humdinger            3    60.0    3    2.40     1.0   110   128          128   +18
4    Feather Boa          2    59.0    4    6.00     0.0   114   126          126   +12
5    Gimme A Shot         2    59.0    5    6.30     0.0   113   126          126   +13
6    Golden Hostess       2    59.0    6    6.35     0.0   119   126          126   +7
7    Going Up             3    60.0    7    6.60     1.0   107   126          126   +19
8    Macara               4    60.0    8    6.85     0.5   98    127          127   +29
9    Marina               4    60.0    9    10.35    0.5   115   127          127   +12
10   Reny                 2    59.0    10   11.85    0.0   106   126          126   +20
11   Miss Cool            2    59.0    11   11.90    0.0   106   126          126   +20
12   Ameena               2    59.0    12   12.05    0.0   111   126          126   +15
13   Emirate Gina         2    59.0    13   14.25    0.0   102   126          126   +24
14   Tipsy Tarragon       2    59.0    14   38.75    0.0   109   126          126   +17
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Princess Calla Line 127 127 127 ✓ Match 0.5
2 Desert Miracle 124 124 129 -5 1.0 -
3 Humdinger 110 119 128 -9 1.0 -
4 Feather Boa 114 114 126 -12 0.0 -
5 Gimme A Shot 113 110 126 -16 0.0 -
6 Golden Hostess 119 112 126 -14 0.0 -
7 Going Up 107 110 126 -16 1.0 -
8 Macara 98 101 127 -26 0.5 -
9 Marina 115 112 127 -15 0.5 -
10 Reny 106 91 126 -35 0.0 -
11 Miss Cool 106 106 126 -20 0.0 -
12 Ameena 111 103 126 -23 0.0 -
13 Emirate Gina 102 103 126 -23 0.0 -
14 Tipsy Tarragon 109 108 126 -18 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