Official NHA Assessment

Race 2: RACEHORSE OWNERS ASSOCIATION GRADUATION PLATE (For 1 & 2 Time Winners & Maidens)

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Line Horse
Swing Upon A Star
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
5 / 7
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    Karangetang          2    60.0    1    0.00     3.5   104   106          106   +2
2    Swing Upon A Star    2    60.0    2    2.50     3.5   106   106          106   +0
3    Mandalay             3    54.5    3    6.25     5.0   63    92           92    +29
4    Highest Honour       4    54.5    4    8.25     6.0   84    90           90    +6
5    Mescal               2    54.5    5    11.75    3.5   77    95           95    +18
6    Exhale               3    54.0    6    14.00    5.0   -     91           91    +91
99   Egyptian King        3    54.0    99   0.00     5.0   -     91           91    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Karangetang 104 95 106 -11 3.5 -
2 Swing Upon A Star Line 106 102 106 -4 3.5
3 Mandalay 63 53 92 -39 5.0 -
4 Highest Honour 84 92 90 +2 6.0 -
5 Mescal 77 64 95 -31 3.5 -
6 Exhale - 66 91 -25 5.0 -
99 Egyptian King - - 91 -91 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