Official NHA Assessment

Race 6: THE BIG MATCH BUILD UP SPRINT CLASS 4 (Open. Benchmark at 60.0kg = 82)

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Line Horse
Clever Trevor
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
4 / 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    Umzingeli Wenyathi   2    53.5    1    0.00     3.5   84    76           76    -8
2    Magic Surprise       2    53.0    2    0.30     3.5   78    75           75    -3
3    Clever Trevor        2    60.0    3    3.00     3.5   89    89           89    +0
4    Moya Wa Laliga       3    59.5    4    3.40     5.0   81    85           85    +4
5    Mighty Zambezi       2    58.5    5    3.80     3.5   86    86           86    +0
6    Maphaka              2    60.5    6    3.95     3.5   83    90           90    +7
7    Rainbow Reward       5    61.5    7    4.65     0.0   90    99           99    +9
8    Danube               3    57.0    8    27.15    5.0   76    80           80    +4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Umzingeli Wenyathi 84 90 76 +14 3.5 -
2 Magic Surprise 78 92 75 +17 3.5 -
3 Clever Trevor Line 89 89 89 ✓ Match 3.5
4 Moya Wa Laliga 81 81 85 -4 5.0 -
5 Mighty Zambezi 86 80 86 -6 3.5 -
6 Maphaka 83 87 90 -3 3.5 -
7 Rainbow Reward 90 89 99 -10 0.0 -
8 Danube 76 76 80 -4 5.0 -
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