Official NHA Assessment

Race 2: KEVIN BACKOS MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Remains Of The Day
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
4 / 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    Hair Trigger         2    58.0    1    0.00     6.5   79    73           73    -6
2    Remains Of The Day   3    57.5    2    2.00     9.5   66    66           66    +0
3    Spy Story            3    58.0    3    3.10     9.5   79    67           69    -10
4    Inspector James      3    58.0    4    4.85     9.5   -     67           67    +67
5    Hong Kong Lucky      3    58.0    5    6.35     9.5   -     67           67    +67
6    Ballarino            3    60.0    6    8.50     9.5   54    71           71    +17
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Hair Trigger 79 76 73 +3 6.5 -
2 Remains Of The Day Line 66 60 66 -6 9.5
3 Spy Story 79 66 69 -3 9.5 -
4 Inspector James - 73 67 +6 9.5 -
5 Hong Kong Lucky - - 67 -67 9.5 -
6 Ballarino 54 49 71 -22 9.5 -
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