Official NHA Assessment

Race 8: www.tabgold.co.za CLASS 4 (Open. Benchmark at 60.0kg = 80)

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Line Horse
El Rey Viene
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 10
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    Okavango             3    61.5    1    0.00     3.5   90    73           73    -17
2    Vila Vicosa          3    53.0    2    1.40     3.5   73    59           63    -10
3    El Rey Viene         5    55.5    3    1.50     0.0   71    71           71    +0
4    Bad Medicine         3    57.0    4    1.90     3.5   81    67           71    -10
5    Chill In The Air     3    57.0    5    3.30     3.5   81    65           71    -10
6    Uzwano               3    57.5    6    3.50     3.5   82    66           72    -10
7    Bom Bom              4    55.5    7    3.90     1.5   71    66           66    -5
8    Banzai Pipeline      7    54.0    8    4.40     0.0   68    65           65    -3
9    Blackberry Breeze    4    56.5    9    10.20    1.5   73    67           67    -6
10   Intuitive Spirit     4    56.5    10   13.00    1.5   73    67           67    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Okavango 90 123 73 +50 3.5 -
2 Vila Vicosa 73 74 63 +11 3.5 -
3 El Rey Viene Line 71 77 71 +6 0.0
4 Bad Medicine 81 100 71 +29 3.5 -
5 Chill In The Air 81 82 71 +11 3.5 -
6 Uzwano 82 96 72 +24 3.5 -
7 Bom Bom 71 64 66 -2 1.5 -
8 Banzai Pipeline 68 62 65 -3 0.0 -
9 Blackberry Breeze 73 71 67 +4 1.5 -
10 Intuitive Spirit 73 57 67 -10 1.5 -
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