Official NHA Assessment

Race 7: LUCKY FISH DIAMOND RICHES CLASS 4 (Open. Benchmark at 60.0kg = 82)

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Line Horse
Nightrain
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
3 / 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    King's Quest         3    59.5    1    0.00     2.5   81    79           79    -2
2    It Is My Time        3    60.5    2    0.10     2.5   83    81           81    -2
3    Nightrain            2    57.5    3    2.10     0.0   83    83           83    +0
4    Show Off             3    58.0    4    3.10     2.5   78    78           78    +0
5    Meet The King        3    56.0    5    3.40     2.5   80    73           73    -7
6    Primal Instinct      3    56.5    6    4.15     2.5   81    74           74    -7
7    Coastal Commander    4    60.5    7    4.25     1.5   83    84           84    +1
8    Thomas Jenkins       3    57.5    8    4.65     2.5   77    75           75    -2
9    Astronomical Boy     2    59.5    9    8.65     0.0   87    84           84    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 King's Quest 81 89 79 +10 2.5 -
2 It Is My Time 83 88 81 +7 2.5 -
3 Nightrain Line 83 83 83 ✓ Match 0.0
4 Show Off 78 77 78 -1 2.5 -
5 Meet The King 80 78 73 +5 2.5 -
6 Primal Instinct 81 78 74 +4 2.5 -
7 Coastal Commander 83 77 84 -7 1.5 -
8 Thomas Jenkins 77 76 75 +1 2.5 -
9 Astronomical Boy 87 87 84 +3 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