Official NHA Assessment

Race 4: BREEDERS GUINEAS PLATE (Fillies) (For 3 year-old Fillies)

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Line Horse
Luna Halo
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
6 / 8
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    Luna Halo            4    60.0    1    0.00     2.5   103   103          103   +0
2    Public Benefit       2    56.0    2    1.25     0.0   91    104          104   +13
3    Global Rush          2    56.0    3    5.25     0.0   77    100          100   +23
4    Symbol Of Love       2    54.0    4    5.50     0.0   71    96           96    +25
5    Idita                4    56.0    5    9.00     2.5   93    95           95    +2
6    Summer Odyssey       2    54.0    6    9.10     0.0   88    96           96    +8
7    Successful Lady      2    54.0    7    13.10    0.0   59    96           96    +37
99   Back For More        4    56.0    99   0.00     2.5   -     95           95    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Luna Halo Line 103 106 103 +3 2.5
2 Public Benefit 91 86 104 -18 0.0 -
3 Global Rush 77 82 100 -18 0.0 -
4 Symbol Of Love 71 94 96 -2 0.0 -
5 Idita 93 79 95 -16 2.5 -
6 Summer Odyssey 88 84 96 -12 0.0 -
7 Successful Lady 59 56 96 -40 0.0 -
99 Back For More - 75 95 -20 2.5 -
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