Official NHA Assessment

Race 6: IN MEMORY OF SEAN PATERSON WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M)

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Line Horse
Lunar Rainbow
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 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    Red Sparrow          3    60.0    1    0.00     3.5   53    68           59    +6
2    Lunar Rainbow        3    60.0    2    10.50    3.5   68    68           68    +0
3    Beverly Baby         3    60.0    3    16.00    3.5   53    68           68    +15
4    Amber Eyes           3    60.0    4    21.50    3.5   58    68           68    +10
5    Pass The Baton       4    60.0    5    29.25    1.5   55    72           72    +17
6    Jinger Jam           3    60.0    6    99.99    3.5   63    68           68    +5
99   Artic Silver         3    60.0    99   99.97    3.5   70    68           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Red Sparrow 53 55 59 -4 3.5 -
2 Lunar Rainbow Line 68 57 68 -11 3.5
3 Beverly Baby 53 53 68 -15 3.5 -
4 Amber Eyes 58 50 68 -18 3.5 -
5 Pass The Baton 55 48 72 -24 1.5 -
6 Jinger Jam 63 63 68 -5 3.5 -
99 Artic Silver 70 77 70 +7 3.5 -
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