Official NHA Assessment

Race 7: NELSON MANDELA BAY RACING POLY CHALLENGE 1600 (Open - 3rd Leg (Non-Blk Type))

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Line Horse
Port Louis
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 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    Gallic Tribe         4    59.5    1    0.00     5.0   95    90           90    -5
2    Port Louis           2    62.0    2    1.00     0.0   109   109          109   +0
3    Prince Of Fire       3    62.0    3    1.75     8.0   111   92           101   -10
4    Narcos               3    58.0    4    1.80     8.0   87    84           84    -3
5    And We Danced        3    59.0    5    2.30     8.0   103   85           93    -10
6    Perfection           3    62.0    6    2.55     8.0   103   91           93    -10
7    Silver Tycoon        7    53.5    7    2.65     0.0   76    90           90    +14
8    Cat Daddy            6    61.0    8    3.90     0.0   101   104          104   +3
9    Naval Secret         4    59.5    9    7.15     5.0   92    90           90    -2
10   Matsuyamo            2    53.5    10   7.65     0.0   77    88           88    +11
11   Safari Blue          3    61.0    11   8.15     8.0   100   87           90    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gallic Tribe 95 101 90 +11 5.0 -
2 Port Louis Line 109 106 109 -3 0.0
3 Prince Of Fire 111 104 101 +3 8.0 -
4 Narcos 87 86 84 +2 8.0 -
5 And We Danced 103 103 93 +10 8.0 -
6 Perfection 103 103 93 +10 8.0 -
7 Silver Tycoon 76 74 90 -16 0.0 -
8 Cat Daddy 101 98 104 -6 0.0 -
9 Naval Secret 92 91 90 +1 5.0 -
10 Matsuyamo 77 78 88 -10 0.0 -
11 Safari Blue 100 91 90 +1 8.0 -
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