Official NHA Assessment

Race 2: ZUVA PETROLEUM BORROWDALE D STAKES 68 (For All Horses with a nett rating of 68 & below)

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Line Horse
Red Top
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
3 / 6
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    Power Ranger         7    60.0    1    0.00     0.0   66    64           64    -2
2    Red Top              5    60.0    2    1.75     0.0   67    67           67    +0
3    Prince Of Denmark    4    54.0    3    2.50     4.5   54    45           45    -9
4    Forever Royal        4    50.0    4    28.50    4.5   36    35           35    -1
99   Audacious            2    51.5    99   0.00     0.0   -     47           47    +0
99   Blazing Sky          3    50.0    99   0.00     7.0   -     30           30    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Power Ranger 66 69 64 +5 0.0 -
2 Red Top Line 67 70 67 +3 0.0
3 Prince Of Denmark 54 51 45 +6 4.5 -
4 Forever Royal 36 36 35 +1 4.5 -
99 Audacious - 61 47 +14 0.0 -
99 Blazing Sky - 46 30 +16 7.0 -
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