Official NHA Assessment

Race 4: BOOK FOR CHARITY MILE MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Silk Garden
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Karin's Legacy       3    57.0    1    0.00     9.0   72    51           51    -21
2    Ponderosa Pine       2    57.0    2    3.75     0.0   -     70           70    +70
3    Coffee In Seattle    3    57.0    3    5.00     9.0   -     51           51    +51
4    Silk Garden          3    60.0    4    5.25     9.0   57    57           57    +0
5    Ballycotton          2    57.0    5    5.75     0.0   63    69           69    +6
6    Twice In Camden      3    60.0    6    8.75     9.0   51    57           57    +6
7    Countess Of Peace    2    57.0    7    13.00    0.0   54    69           69    +15
8    Unapologetic         2    57.0    8    22.00    0.0   61    69           69    +8
99   Allthewayfromusa     2    57.0    99   0.00     0.0   -     69           69    +0
99   Duchessofnormandy    2    57.0    99   0.00     0.0   -     69           69    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Karin's Legacy 72 70 51 +19 9.0 -
2 Ponderosa Pine - 63 70 -7 0.0 -
3 Coffee In Seattle - 54 51 +3 9.0 -
4 Silk Garden Line 57 56 57 -1 9.0
5 Ballycotton 63 53 69 -16 0.0 -
6 Twice In Camden 51 46 57 -11 9.0 -
7 Countess Of Peace 54 52 69 -17 0.0 -
8 Unapologetic 61 51 69 -18 0.0 -
99 Allthewayfromusa - 57 69 -12 0.0 -
99 Duchessofnormandy - 54 69 -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