Official NHA Assessment

Race 4: RACING TODAY OPEN MAIDEN (For all Maidens)

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Line Horse
River Fern
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
6 / 11
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    Gale Warning         2    59.5    1    0.00     4.0   73    81           79    +6
2    River Fern           2    56.5    2    3.25     4.0   75    75           75    +0
3    O Space O            2    57.0    3    3.50     4.0   60    76           76    +16
4    Good Shine           2    56.0    4    4.75     4.0   58    74           74    +16
5    Elusive Bomba        3    50.5    5    5.00     6.0   59    59           59    +0
6    Timeline             3    53.0    6    5.75     6.0   64    64           64    +0
7    World Soprano        2    61.0    7    5.85     4.0   68    84           84    +16
8    Smiddyburn           3    61.0    8    6.60     6.0   -     80           80    +80
9    Miss Mackie          3    52.0    9    6.85     6.0   47    62           62    +15
10   Mediterraneanflame   3    51.5    10   6.95     6.0   60    61           61    +1
11   Alesian Beau         3    61.0    11   14.45    6.0   68    80           80    +12
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gale Warning 73 79 79 ✓ Match 4.0 -
2 River Fern Line 75 73 75 -2 4.0
3 O Space O 60 59 76 -17 4.0 -
4 Good Shine 58 55 74 -19 4.0 -
5 Elusive Bomba 59 59 59 ✓ Match 6.0 -
6 Timeline 64 53 64 -11 6.0 -
7 World Soprano 68 65 84 -19 4.0 -
8 Smiddyburn - 77 80 -3 6.0 -
9 Miss Mackie 47 49 62 -13 6.0 -
10 Mediterraneanflame 60 60 61 -1 6.0 -
11 Alesian Beau 68 66 80 -14 6.0 -
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