Official NHA Assessment

Race 2: RACING TODAY MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Duchess Zahra
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
7 / 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    Duchess Zahra        3    58.5    1    0.00     6.0   -     -            -     +0
2    Princess Of All      3    60.0    2    0.90     6.0   71    3            61    -10
3    Elegant Edge         3    60.0    3    2.60     6.0   -     3            3     +3
4    Mystical Butterfly   3    60.0    4    4.40     6.0   -     3            3     +3
5    Nicolson Landing     3    60.0    5    5.90     6.0   -     3            3     +3
6    Foxy After Dark      3    60.0    6    6.15     6.0   -     3            3     +3
7    Loveonthehorizon     3    60.0    7    6.45     6.0   49    3            39    -10
8    Bell Of Angelus      2    60.0    8    7.45     4.0   66    7            56    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Duchess Zahra Line - 76 - +76 6.0
2 Princess Of All 71 73 61 +12 6.0 -
3 Elegant Edge - 70 3 +67 6.0 -
4 Mystical Butterfly - 72 3 +69 6.0 -
5 Nicolson Landing - 74 3 +71 6.0 -
6 Foxy After Dark - - 3 -3 6.0 -
7 Loveonthehorizon 49 59 39 +20 6.0 -
8 Bell Of Angelus 66 71 56 +15 4.0 -
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