Official NHA Assessment

Race 1: 4RACING CELEBRATES ALL THE WOMEN IN RACING MAIDEN PLATE (3-year-olds) (For Maiden 3 year-olds)

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Line Horse
The Roaring Rock
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
8 / 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    The Roaring Rock     2    60.0    1    0.00     7.0   79    79           79    +0
2    All Systems Go       3    60.0    2    1.75     10.5  -     72           72    +72
3    Bugle                2    60.0    3    3.00     7.0   -     79           79    +79
4    Bright Eruption      2    60.0    4    4.75     7.0   -     79           79    +79
5    World Of Diamonds    2    53.5    5    6.00     7.0   -     66           66    +66
6    Quick Crown          2    57.5    6    6.05     7.0   44    74           74    +30
7    Mediterraneanflame   3    57.5    7    9.30     10.5  -     67           67    +67
8    Touch The Sword      3    58.0    8    9.80     10.5  -     68           68    +68
9    Looking Good         2    57.5    9    11.05    7.0   -     74           74    +74
10   Nordic Spy           3    60.0    10   11.80    10.5  -     72           72    +72
11   Throw A Party        2    57.5    11   22.80    7.0   69    74           74    +5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 The Roaring Rock Line 79 79 79 ✓ Match 7.0
2 All Systems Go - 102 72 +30 10.5 -
3 Bugle - 65 79 -14 7.0 -
4 Bright Eruption - 67 79 -12 7.0 -
5 World Of Diamonds - 59 66 -7 7.0 -
6 Quick Crown 44 65 74 -9 7.0 -
7 Mediterraneanflame - 60 67 -7 10.5 -
8 Touch The Sword - 64 68 -4 10.5 -
9 Looking Good - 64 74 -10 7.0 -
10 Nordic Spy - 56 72 -16 10.5 -
11 Throw A Party 69 69 74 -5 7.0 -
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