Official NHA Assessment

Race 3: TAB 4RACING APP MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Delaware River
Reference for assessment
Exact Matches
1 / 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    Aquarius             3    59.0    1    0.00     5.0   -     64           6     +6
2    Delaware River       2    59.0    2    2.25     0.0   77    77           77    +0
3    Kortvandraad         3    60.0    3    4.50     5.0   62    66           66    +4
4    Hat And Heels        3    57.5    4    4.90     5.0   -     61           61    +61
5    Truly Magical        2    59.0    5    5.50     0.0   70    74           74    +4
6    Palace Script        3    59.0    6    10.75    5.0   -     64           64    +64
7    Fire Within          3    59.0    7    13.25    5.0   47    64           64    +17
8    Leanne's Love        2    59.0    8    16.75    0.0   63    74           74    +11
99   Charleston Dawn      2    59.0    99   0.00     0.0   -     74           74    +0
99   Jack's Legacy        3    59.0    99   0.00     5.0   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Aquarius - 81 6 +75 5.0 -
2 Delaware River Line 77 77 77 ✓ Match 0.0
3 Kortvandraad 62 71 66 +5 5.0 -
4 Hat And Heels - 75 61 +14 5.0 -
5 Truly Magical 70 67 74 -7 0.0 -
6 Palace Script - 77 64 +13 5.0 -
7 Fire Within 47 52 64 -12 5.0 -
8 Leanne's Love 63 58 74 -16 0.0 -
99 Charleston Dawn - 61 74 -13 0.0 -
99 Jack's Legacy - - 64 -64 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