Official NHA Assessment

Race 6: TRACK AND BALL DERBY (Grade 3) (For Horses at Weight For Age + Penalties)

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Line Horse
Aragosta
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 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    Runaway Song         6    58.0    1    0.00     0.0   92    116          98    +6
2    Aragosta             3    58.0    2    1.80     3.0   114   114          114   +0
3    With Pleasure        3    58.0    3    4.80     3.0   90    110          110   +20
4    Shangani             4    59.0    4    4.90     1.0   120   116          116   -4
5    Salvator Mundi       4    60.0    5    5.70     1.0   109   118          118   +9
6    Airways Law          4    59.0    6    6.00     1.0   110   116          116   +6
99   Platinum Sky         3    58.0    99   0.00     3.0   -     110          110   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Runaway Song 92 98 98 ✓ Match 0.0 -
2 Aragosta Line 114 109 114 -5 3.0
3 With Pleasure 90 97 110 -13 3.0 -
4 Shangani 120 118 116 +2 1.0 -
5 Salvator Mundi 109 98 118 -20 1.0 -
6 Airways Law 110 102 116 -14 1.0 -
99 Platinum Sky - 99 110 -11 3.0 -
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