Official NHA Assessment

Race 6: PERFECTLY PLACED CLASS 4 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 78)

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Line Horse
Night Vigil
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 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    She's My Captain     3    58.0    1    0.00     2.0   74    77           77    +3
2    Palo Queen           5    59.0    2    0.40     0.0   76    83           83    +7
3    Night Vigil          4    60.5    3    1.15     2.5   81    81           81    +0
4    Love Shack           2    60.0    4    3.40     1.0   80    83           83    +3
5    Hear My Voice        2    58.5    5    5.40     1.0   75    80           80    +5
6    Back To The Future   2    58.0    6    5.50     1.0   74    79           79    +5
7    Nile The Boss        4    54.0    7    7.25     2.5   68    68           68    +0
8    Tequila Sky          4    59.5    8    7.30     2.5   79    79           79    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 She's My Captain 74 77 77 ✓ Match 2.0 -
2 Palo Queen 76 70 83 -13 0.0 -
3 Night Vigil Line 81 91 81 +10 2.5
4 Love Shack 80 69 83 -14 1.0 -
5 Hear My Voice 75 54 80 -26 1.0 -
6 Back To The Future 74 74 79 -5 1.0 -
7 Nile The Boss 68 52 68 -16 2.5 -
8 Tequila Sky 79 74 79 -5 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