Official NHA Assessment

Race 8: WILGERBOSDRIFT & MAURITZFONTEIN CLASS 4 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 80)

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Line Horse
Happy Fortune
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
5 / 9
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    Ubukhwebezana        4    60.0    1    0.00     12.0  80    77           77    -3
2    Icy Lancaster        3    57.5    2    1.30     10.5  75    75           75    +0
3    Happy Fortune        3    56.5    3    3.10     10.5  73    73           73    +0
4    Happy Analia         4    59.5    4    3.25     12.0  79    76           76    -3
5    Golden Moment        3    61.0    5    5.35     10.5  82    82           82    +0
6    On Board             3    55.5    6    5.45     10.5  71    71           71    +0
7    Ruby Rising          3    55.0    7    5.75     10.5  75    70           70    -5
8    Blind Speed          2    57.0    8    11.05    7.0   74    81           81    +7
99   Princess Goldie      3    56.5    99   0.00     10.5  -     73           73    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ubukhwebezana 80 93 77 +16 12.0 -
2 Icy Lancaster 75 76 75 +1 10.5 -
3 Happy Fortune Line 73 80 73 +7 10.5
4 Happy Analia 79 78 76 +2 12.0 -
5 Golden Moment 82 62 82 -20 10.5 -
6 On Board 71 66 71 -5 10.5 -
7 Ruby Rising 75 77 70 +7 10.5 -
8 Blind Speed 74 65 81 -16 7.0 -
99 Princess Goldie - 73 73 ✓ Match 10.5 -
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