Official NHA Assessment

Race 4: WSB GRAND HERITAGE 20 DECEMBER MAIDEN PLATE (For all Maidens)

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Line Horse
Underdog
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
9 / 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    Saketini             2    60.0    1    0.00     4.0   64    64           64    +0
2    Rock Music           2    60.0    2    3.00     4.0   63    64           64    +1
3    Inspector James      3    60.0    3    7.00     6.0   75    60           65    -10
4    Monkey's Wedding     3    60.0    4    7.60     6.0   -     60           60    +60
5    Underdog             3    56.0    5    9.60     6.0   52    52           52    +0
6    Edelsteen            3    60.0    6    12.00    6.0   -     60           60    +60
7    Sabrage              3    60.0    7    17.25    6.0   -     60           60    +60
8    Royal Society        2    60.0    8    25.25    4.0   48    64           64    +16
99   Mystical Butterfly   3    57.5    99   0.00     6.0   -     55           55    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Saketini 64 83 64 +19 4.0 -
2 Rock Music 63 75 64 +11 4.0 -
3 Inspector James 75 73 65 +8 6.0 -
4 Monkey's Wedding - 72 60 +12 6.0 -
5 Underdog Line 52 58 52 +6 6.0
6 Edelsteen - - 60 -60 6.0 -
7 Sabrage - 51 60 -9 6.0 -
8 Royal Society 48 48 64 -16 4.0 -
99 Mystical Butterfly - 72 55 +17 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