Official NHA Assessment

Race 7: TOPBET MIKE O'CONNOR JOBURG SPRING CHALLENGE (Grade 2) (For all horses at Weight for age + Penalties)

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Line Horse
Bingwa
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
6 / 11
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    William Robertson    6    58.5    1    0.00     0.0   125   114          114   -11
2    After The Rain       4    59.0    2    0.25     5.0   104   105          105   +1
3    Bingwa               7    60.0    3    3.75     0.0   118   118          118   +0
4    Mercantour           5    51.0    4    4.85     0.0   105   99           99    -6
5    Zillzaal             6    59.0    5    5.55     0.0   116   115          115   -1
6    Prince Of Fire       3    58.5    6    5.60     8.0   114   98           104   -10
7    Sovereign Spirit     6    59.0    7    8.20     0.0   113   115          115   +2
8    Forever Mine         4    59.0    8    8.40     5.0   103   105          105   +2
9    Hoedspruit           4    60.0    9    9.20     5.0   114   107          107   -7
10   Team Gold            3    58.5    10   13.30    8.0   103   98           98    -5
99   Puerto Manzano (ARG  4    59.0    99   0.00     5.0   -     105          105   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 William Robertson 125 124 114 +10 0.0 -
2 After The Rain 104 98 105 -7 5.0 -
3 Bingwa Line 118 107 118 -11 0.0
4 Mercantour 105 113 99 +14 0.0 -
5 Zillzaal 116 112 115 -3 0.0 -
6 Prince Of Fire 114 104 104 ✓ Match 8.0 -
7 Sovereign Spirit 113 106 115 -9 0.0 -
8 Forever Mine 103 105 105 ✓ Match 5.0 -
9 Hoedspruit 114 109 107 +2 5.0 -
10 Team Gold 103 97 98 -1 8.0 -
99 Puerto Manzano (ARG) - 119 105 +14 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