Official NHA Assessment

Race 1: WELCOME TO THE BETWAY SPRING SPREE CHALLENGE MAIDEN PLATE (3 year-old Fillies) (For Maiden 3-year-old Fillies)

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Line Horse
Comic Artist
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
7 / 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    Zahra Dominia        2    60.0    1    0.00     0.0   75    -1           -     -75
2    Flying World         2    60.0    2    0.75     0.0   -     3            3     +3
3    Sassy Lassie         2    60.0    3    2.75     0.0   56    1            46    -10
4    Comic Artist         2    60.0    4    3.45     0.0   -     -            -     +0
5    Erebus               2    60.0    5    8.20     0.0   70    -1           60    -10
6    Artifact             3    60.0    6    8.70     9.0   -     -19          -     +0
7    Super Miss           2    60.0    7    9.20     0.0   -     -1           -     +0
8    Global Royalty       2    60.0    8    13.00    0.0   -     -1           -     +0
9    Erik's Girl          2    56.0    9    99.99    0.0   67    -9           57    -10
99   Au Revoir Tanya      2    60.0    99   0.00     0.0   -     -1           -1    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zahra Dominia 75 70 - +70 0.0 -
2 Flying World - 70 3 +67 0.0 -
3 Sassy Lassie 56 59 46 +13 0.0 -
4 Comic Artist Line - 75 - +75 0.0
5 Erebus 70 66 60 +6 0.0 -
6 Artifact - - - ✓ Match 9.0 -
7 Super Miss - - - ✓ Match 0.0 -
8 Global Royalty - 48 - +48 0.0 -
9 Erik's Girl 67 67 57 +10 0.0 -
99 Au Revoir Tanya - - -1 +1 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