Official NHA Assessment

Race 2: CONGRATULATIONS CRAIG ZACKEY ON YOUR JULY DAY WINNER MAIDEN PLATE (F & M) (For Maiden F & M)

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Line Horse
None identified
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 9
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    Surprise Party       2    57.0    1    0.00     0.5   -     -            -     +0
2    Iconic Winter        2    60.0    2    0.25     0.5   -     -            -     +0
3    Gaslight Dancer      2    57.0    3    0.50     0.5   -     -            -     +0
4    Babette's Feast      2    57.0    4    3.90     0.5   -     -            -     +0
5    Heavenly Good        2    57.0    5    4.00     0.5   -     -            -     +0
6    Comic Artist         2    57.0    6    4.75     0.5   -     -            -     +0
7    Erebus               2    57.0    7    10.00    0.5   -     -            -     +0
8    Cyber Spirit         2    60.0    8    11.50    0.5   67    -            60    -7
9    Red Enchantress      2    57.0    9    12.50    0.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Surprise Party - 83 - +83 0.5 -
2 Iconic Winter - 68 - +68 0.5 -
3 Gaslight Dancer - 85 - +85 0.5 -
4 Babette's Feast - 81 - +81 0.5 -
5 Heavenly Good - 77 - +77 0.5 -
6 Comic Artist - 75 - +75 0.5 -
7 Erebus - 66 - +66 0.5 -
8 Cyber Spirit 67 62 60 +2 0.5 -
9 Red Enchantress - 66 - +66 0.5 -
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