Official NHA Assessment

Race 4: RIETHUISKRAAL STUD D STAKES (For All Horses with a nett rating of 69 & below)

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Line Horse
My Only Weakness
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
9 / 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    Summer Night City    5    56.0    1    0.00     0.0   58    82           64    +6
2    My Only Weakness     3    61.5    2    0.05     6.0   81    81           81    +0
3    Mela Strength        3    61.5    3    0.45     6.0   64    86           86    +22
4    Tothemoonandback     5    64.0    4    0.85     0.0   69    102          102   +33
5    Past And Present     3    57.5    5    0.95     6.0   70    77           77    +7
6    White Seahorse       2    56.0    6    2.70     0.0   68    84           84    +16
7    Gold Index           3    60.0    7    5.45     6.0   61    78           78    +17
8    State Capitol        4    59.0    8    6.70     3.0   63    82           82    +19
9    Winter's Dragon      3    52.0    9    9.45     6.0   62    62           62    +0
10   Avignon              4    58.5    10   9.95     3.0   59    81           81    +22
11   First In Town        2    50.5    11   10.25    0.0   49    71           71    +22
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Summer Night City 58 57 64 -7 0.0 -
2 My Only Weakness Line 81 84 81 +3 6.0
3 Mela Strength 64 63 86 -23 6.0 -
4 Tothemoonandback 69 69 102 -33 0.0 -
5 Past And Present 70 68 77 -9 6.0 -
6 White Seahorse 68 81 84 -3 0.0 -
7 Gold Index 61 53 78 -25 6.0 -
8 State Capitol 63 55 82 -27 3.0 -
9 Winter's Dragon 62 68 62 +6 6.0 -
10 Avignon 59 61 81 -20 3.0 -
11 First In Town 49 49 71 -22 0.0 -
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