Official NHA Assessment

Race 5: NICK VAN DER HEYDEN MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Jaipur Jewel
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 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    Jaipur Jewel         3    60.0    1    0.00     2.5   72    72           72    +0
2    Michelin Star        3    60.0    2    2.00     2.5   66    75           75    +9
3    Blonde Act           3    60.0    3    2.75     2.5   70    74           74    +4
4    Porfirio             6    60.0    4    3.50     0.0   -     78           78    +78
5    Mcebisi              4    60.0    5    4.75     1.0   66    75           75    +9
6    Takagari             4    60.0    6    6.25     1.0   48    75           75    +27
7    Plenty Of It         3    58.5    7    30.25    2.5   -     69           69    +69
99   Grand Destiny        3    60.0    99   0.00     2.5   -     72           72    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Jaipur Jewel Line 72 68 72 -4 2.5
2 Michelin Star 66 68 75 -7 2.5 -
3 Blonde Act 70 96 74 +22 2.5 -
4 Porfirio - 88 78 +10 0.0 -
5 Mcebisi 66 70 75 -5 1.0 -
6 Takagari 48 50 75 -25 1.0 -
7 Plenty Of It - 22 69 -47 2.5 -
99 Grand Destiny - 55 72 -17 2.5 -
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