Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY OPEN MAIDEN (F & M) (For all Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Tune Again
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 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    String Of Lights     4    61.0    1    0.00     9.0   66    48           48    -18
2    Serendipitous        3    59.5    2    0.10     7.5   73    48           63    -10
3    Tune Again           6    54.5    3    1.10     0.0   53    53           53    +0
4    Fantasy Girl         2    58.0    4    1.85     5.0   70    50           60    -10
5    Alpine Diamond       3    51.5    5    5.85     7.5   50    32           40    -10
6    Sweet Cake           2    61.0    6    7.35     5.0   76    56           66    -10
7    Big Spender          3    52.0    7    10.60    7.5   30    33           33    +3
8    Igisha               3    60.0    8    10.70    7.5   -     49           49    +49
9    Natural Wonder       3    54.0    9    20.20    7.5   62    37           52    -10
10   Gotcha Buzz          2    57.0    10   99.94    5.0   57    48           48    -9
99   Faraway Star         2    60.0    99   0.00     5.0   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 String Of Lights 66 66 48 +18 9.0 -
2 Serendipitous 73 60 63 -3 7.5 -
3 Tune Again Line 53 50 53 -3 0.0
4 Fantasy Girl 70 58 60 -2 5.0 -
5 Alpine Diamond 50 56 40 +16 7.5 -
6 Sweet Cake 76 60 66 -6 5.0 -
7 Big Spender 30 30 33 -3 7.5 -
8 Igisha - - 49 -49 7.5 -
9 Natural Wonder 62 55 52 +3 7.5 -
10 Gotcha Buzz 57 61 48 +13 5.0 -
99 Faraway Star - - 54 -54 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