Official NHA Assessment

Race 4: JOIN THE RACE COAST TURF CLUB TODAY! CLASS 4 (Open. Benchmark at 60.0kg = 82)

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Line Horse
Royal Sword
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
5 / 10
Within 2 points
Significant Diffs
2 / 10
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    Dubai Dude           3    56.5    1    0.00     1.5   79    77           77    -2
2    Grand Appeal         3    57.0    2    0.05     1.5   76    78           78    +2
3    Royal Sword          2    59.0    3    2.35     0.0   87    87           87    +0
4    Tam's Knight         3    59.5    4    3.15     1.5   81    85           85    +4
5    Ibutho               7    60.5    5    6.15     0.0   83    88           88    +5
6    Spaarne Rivier       3    59.0    6    6.45     1.5   84    82           82    -2
7    Pembury              2    52.0    7    7.75     0.0   75    71           71    -4
8    Johnny Boy           3    57.5    8    8.15     1.5   84    79           79    -5
9    Clever Trevor        2    61.5    9    10.15    0.0   89    90           90    +1
99   Notable              2    58.5    99   0.00     0.0   -     84           84    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Dubai Dude 79 83 77 +6 1.5 -
2 Grand Appeal 76 77 78 -1 1.5 -
3 Royal Sword Line 87 87 87 ✓ Match 0.0
4 Tam's Knight 81 81 85 -4 1.5 -
5 Ibutho 83 82 88 -6 0.0 -
6 Spaarne Rivier 84 81 82 -1 1.5 -
7 Pembury 75 71 71 ✓ Match 0.0 -
8 Johnny Boy 84 81 79 +2 1.5 -
9 Clever Trevor 89 87 90 -3 0.0 -
99 Notable - 79 84 -5 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