Official NHA Assessment

Race 7: NELSON MANDELA BAY RACING EAST CAPE POLY CHALLENGE (Open - 2nd Leg (Non-Blk Type))

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Line Horse
Usa's Hope
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 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    Mercantour           5    62.0    1    0.00     0.0   111   96           96    -15
2    Guy Gibson           2    61.0    2    0.75     0.0   100   98           98    -2
3    Eyjafjallajokull     2    58.0    3    1.25     0.0   88    92           92    +4
3    Usa's Hope           2    61.0    3    1.25     0.0   98    98           98    +0
5    Golden Link          3    61.0    5    2.00     8.0   101   81           91    -10
6    Champonelle          4    58.0    6    3.25     5.0   90    80           80    -10
7    The Africa House     4    59.5    7    5.50     5.0   94    81           84    -10
8    Yamadori             4    61.0    8    5.75     5.0   101   84           91    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mercantour 111 113 96 +17 0.0 -
2 Guy Gibson 100 99 98 +1 0.0 -
3 Eyjafjallajokull 88 86 92 -6 0.0 -
3 Usa's Hope Line 98 97 98 -1 0.0
5 Golden Link 101 99 91 +8 8.0 -
6 Champonelle 90 87 80 +7 5.0 -
7 The Africa House 94 93 84 +9 5.0 -
8 Yamadori 101 97 91 +6 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