Official NHA Assessment

Race 4: TOTE FOR THE WIN MIDDLE STAKES (F & M) (For Fillies and Mares)

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Line Horse
Back At The George
Reference for assessment
Exact Matches
2 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
1 / 8
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    Buttercup Baby       3    57.0    1    0.00     3.5   88    85           85    -3
2    Sovereign Grant      4    60.0    2    0.50     4.0   93    90           90    -3
3    Back At The George   2    58.5    3    1.40     2.5   90    90           90    +0
4    Kythera              2    58.5    4    1.45     2.5   87    90           90    +3
5    Convocation          5    60.0    5    1.95     0.0   94    98           98    +4
6    Hierkommiebokkie     5    58.5    6    2.95     0.0   93    95           95    +2
7    Valieva              3    54.0    7    4.15     3.5   78    79           79    +1
99   Magical View         3    58.5    99   0.00     3.5   -     88           88    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Buttercup Baby 88 98 85 +13 3.5 -
2 Sovereign Grant 93 92 90 +2 4.0 -
3 Back At The George Line 90 90 90 ✓ Match 2.5
4 Kythera 87 87 90 -3 2.5 -
5 Convocation 94 94 98 -4 0.0 -
6 Hierkommiebokkie 93 90 95 -5 0.0 -
7 Valieva 78 78 79 -1 3.5 -
99 Magical View - 88 88 ✓ Match 3.5 -
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