Official NHA Assessment

Race 5: PERFECTLY PLACED MAIDEN PLATE (For all Maidens)

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Line Horse
Rockanrollin (AUS)
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
4 / 12
Within 2 points
Significant Diffs
7 / 12
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    Coco's Hero          2    56.0    1    0.00     0.0   -     78           6     +6
2    Lomu                 2    56.0    2    1.75     0.0   79    81           81    +2
3    Rockanrollin (AUS)   2    56.0    3    3.00     0.0   80    80           80    +0
4    Joshua               3    60.0    4    3.75     9.5   59    68           68    +9
5    Signor Dante         3    60.0    5    5.25     9.5   72    67           67    -5
6    Getupandgo           2    56.0    6    5.55     0.0   82    78           78    -4
7    Wonderful Tonight    2    56.0    7    7.55     0.0   78    78           78    +0
8    Heavenly Prince      2    56.0    8    7.85     0.0   -     78           78    +78
9    Phantom Man          4    60.0    9    8.60     6.0   -     74           74    +74
10   Conditionally        2    56.0    10   10.60    0.0   73    78           78    +5
11   Fort Impreza         3    60.0    11   11.35    9.5   62    67           67    +5
12   City Of Port Louis   2    56.0    12   15.85    0.0   60    78           78    +18
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Coco's Hero - 96 6 +90 0.0 -
2 Lomu 79 82 81 +1 0.0 -
3 Rockanrollin (AUS) Line 80 81 80 +1 0.0
4 Joshua 59 70 68 +2 9.5 -
5 Signor Dante 72 74 67 +7 9.5 -
6 Getupandgo 82 79 78 +1 0.0 -
7 Wonderful Tonight 78 72 78 -6 0.0 -
8 Heavenly Prince - 67 78 -11 0.0 -
9 Phantom Man - 71 74 -3 6.0 -
10 Conditionally 73 65 78 -13 0.0 -
11 Fort Impreza 62 56 67 -11 9.5 -
12 City Of Port Louis 60 63 78 -15 0.0 -
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