Official NHA Assessment

Race 5: TOP BET SPRING CHALLENGE 1 OCTOBER MAIDEN HANDICAP (For Maidens with 3 or more runs)

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Line Horse
Prime Example
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    The Inkosana         3    56.5    1    0.00     9.5   58    56           58    +0
2    Prime Example        2    54.5    2    0.20     0.0   71    71           71    +0
3    The Merciful         5    52.0    3    0.80     0.0   63    70           70    +7
4    Clap Of Thunder      3    60.0    4    4.90     9.5   65    63           63    -2
5    Mr Bodacious         2    55.0    5    9.65     0.0   72    72           72    +0
6    Ford Fairlane        2    52.0    6    12.90    0.0   51    66           66    +15
7    Going Global         3    52.0    7    13.40    9.5   49    47           47    -2
99   Lord Of Light        2    57.5    99   0.00     0.0   -     77           77    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 The Inkosana 58 67 58 +9 9.5 -
2 Prime Example Line 71 93 71 +22 0.0
3 The Merciful 63 54 70 -16 0.0 -
4 Clap Of Thunder 65 66 63 +3 9.5 -
5 Mr Bodacious 72 65 72 -7 0.0 -
6 Ford Fairlane 51 41 66 -25 0.0 -
7 Going Global 49 50 47 +3 9.5 -
99 Lord Of Light - 77 77 ✓ Match 0.0 -
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