Official NHA Assessment

Race 3: JOIN THE MAGIC MAIDEN PLATE (For all Maidens)

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Line Horse
Thunder Downunder
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
4 / 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    October Storm        2    57.0    1    0.00     1.0   -     73           6     +6
2    Magical Place        2    57.0    2    2.75     1.0   -     73           73    +73
3    Thunder Downunder    3    57.5    3    3.25     2.0   72    72           72    +0
4    Iko Iko              2    60.0    4    4.50     1.0   76    79           79    +3
5    Eternal Diamond      2    57.0    5    4.90     1.0   -     73           73    +73
6    Fleur De Ville       3    58.0    6    8.40     2.0   75    73           73    -2
7    Flight Engineer      3    60.0    7    15.40    2.0   65    77           77    +12
99   Moody Blue           3    60.0    99   0.00     2.0   -     77           77    +0
99   Digby                2    60.0    99   0.00     1.0   -     79           79    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 October Storm - 85 6 +79 1.0 -
2 Magical Place - 92 73 +19 1.0 -
3 Thunder Downunder Line 72 72 72 ✓ Match 2.0
4 Iko Iko 76 76 79 -3 1.0 -
5 Eternal Diamond - 74 73 +1 1.0 -
6 Fleur De Ville 75 60 73 -13 2.0 -
7 Flight Engineer 65 58 77 -19 2.0 -
99 Moody Blue - 75 77 -2 2.0 -
99 Digby - 77 79 -2 1.0 -
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