Official NHA Assessment

Race 4: CLASSIC DAY 7 MARCH MAIDEN PLATE (For all Maidens)

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Line Horse
Rock Music
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
7 / 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    Rock Music           2    56.0    1    0.00     3.5   73    73           73    +0
2    Scorpio              2    60.0    2    0.50     3.5   75    81           81    +6
3    Treasure State       3    57.5    3    2.25     5.0   -     73           73    +73
4    King Redoute         3    60.0    4    4.65     5.0   -     78           78    +78
5    In The Willows       2    60.0    5    17.25    3.5   57    81           81    +24
99   Stoneywood           3    60.0    99   0.00     5.0   -     78           78    +0
99   Charleston Dawn      2    57.5    99   0.00     3.5   -     76           76    +0
99   Scott's Guard        2    57.5    99   0.00     3.5   -     76           76    +0
99   Edelsteen            3    60.0    99   0.00     5.0   -     78           78    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rock Music Line 73 75 73 +2 3.5
2 Scorpio 75 75 81 -6 3.5 -
3 Treasure State - - 73 -73 5.0 -
4 King Redoute - 80 78 +2 5.0 -
5 In The Willows 57 54 81 -27 3.5 -
99 Stoneywood - 88 78 +10 5.0 -
99 Charleston Dawn - 61 76 -15 3.5 -
99 Scott's Guard - 63 76 -13 3.5 -
99 Edelsteen - - 78 -78 5.0 -
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