Official NHA Assessment

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

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Line Horse
Silver Darling
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
4 / 10
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    She's A Keeper       5    60.0    1    0.00     0.0   115   114          114   -1
2    Marina               4    60.0    2    2.00     0.5   118   116          116   -2
3    Silver Darling       3    59.0    3    2.20     1.0   113   113          113   +0
4    Captain's Ransom     4    60.0    4    3.25     0.5   126   115          116   -10
5    Zarina               4    60.0    5    3.75     0.5   114   114          114   +0
6    Under Your Spell     3    59.0    6    4.15     1.0   119   111          111   -8
7    Kailene              3    59.0    7    4.20     1.0   106   111          111   +5
8    Supreme Quest        3    59.0    8    4.60     1.0   108   110          110   +2
9    Sweet Future         4    60.0    9    8.20     0.5   110   113          113   +3
10   Oscar's Winner       4    60.0    10   10.60    0.5   96    113          113   +17
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 She's A Keeper 115 117 114 +3 0.0 -
2 Marina 118 112 116 -4 0.5 -
3 Silver Darling Line 113 115 113 +2 1.0
4 Captain's Ransom 126 124 116 +8 0.5 -
5 Zarina 114 111 114 -3 0.5 -
6 Under Your Spell 119 113 111 +2 1.0 -
7 Kailene 106 79 111 -32 1.0 -
8 Supreme Quest 108 92 110 -18 1.0 -
9 Sweet Future 110 110 113 -3 0.5 -
10 Oscar's Winner 96 91 113 -22 0.5 -
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