Official NHA Assessment

Race 1: SMYRNA MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
One Smart Cookie
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 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    Nellie Melba         4    60.0    1    0.00     6.0   75    75           70    -5
2    One Smart Cookie     4    60.0    2    0.80     6.0   75    75           75    +0
3    Dawn Surprise        4    60.0    3    3.30     6.0   -     75           75    +75
4    Jazz Cafe            3    58.5    4    3.80     5.0   -     74           74    +74
5    The Queen Bee        4    60.0    5    4.05     6.0   74    75           75    +1
6    Captain Marvel       3    60.0    6    4.30     5.0   53    77           77    +24
7    Gorgeous Girl        4    60.0    7    4.40     6.0   -     75           75    +75
8    November Boogie      3    60.0    8    11.80    5.0   -     77           77    +77
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Nellie Melba 75 68 70 -2 6.0 -
2 One Smart Cookie Line 75 95 75 +20 6.0
3 Dawn Surprise - 79 75 +4 6.0 -
4 Jazz Cafe - 82 74 +8 5.0 -
5 The Queen Bee 74 53 75 -22 6.0 -
6 Captain Marvel 53 49 77 -28 5.0 -
7 Gorgeous Girl - 74 75 -1 6.0 -
8 November Boogie - 69 77 -8 5.0 -
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