Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION MR 79 HANDICAP (Open)

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Line Horse
Night Ruler
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
2 / 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    Aeneas               3    58.5    1    0.00     1.0   78    78           78    +0
2    Night Ruler          3    59.0    2    4.75     1.0   79    79           79    +0
3    Millahue             3    60.0    3    6.00     1.0   81    81           81    +0
4    Captive Moon         6    57.0    4    13.25    0.0   75    77           77    +2
5    Service Ace          3    57.5    5    13.45    1.0   76    76           76    +0
6    Paper Trail          4    59.0    6    14.20    0.5   77    80           80    +3
7    Impact               3    52.5    7    99.99    1.0   65    66           66    +1
99   Que Shiraz           3    58.5    99   0.00     1.0   -     78           78    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Aeneas 78 82 78 +4 1.0 -
2 Night Ruler Line 79 75 79 -4 1.0
3 Millahue 81 81 81 ✓ Match 1.0 -
4 Captive Moon 75 75 77 -2 0.0 -
5 Service Ace 76 73 76 -3 1.0 -
6 Paper Trail 77 60 80 -20 0.5 -
7 Impact 65 65 66 -1 1.0 -
99 Que Shiraz - 72 78 -6 1.0 -
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