Official NHA Assessment

Race 5: RACING240 MAIDEN PLATE (F & M) (For Maiden (F&M) R10 000 Win Bonus ROA Members)

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Line Horse
Silver Slippers
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
2 / 12
Within 2 points
Significant Diffs
9 / 12
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    Different Drum       3    60.0    1    0.00     2.5   57    63           63    +6
2    Silver Slippers      3    60.0    2    0.10     2.5   63    63           63    +0
3    Libran Lana          3    60.0    3    0.60     2.5   62    68           68    +6
4    Rose Of Mine         3    60.0    4    1.85     2.5   65    66           66    +1
5    Sailaway With Me     3    60.0    5    2.35     2.5   67    65           65    -2
6    Sugar Snap           3    60.0    6    2.60     2.5   63    65           65    +2
7    Nova Stella          4    60.0    7    3.10     1.5   44    67           67    +23
8    Back To Formentera   3    60.0    8    4.10     2.5   63    64           64    +1
9    A Foreign Affair     3    60.0    9    9.85     2.5   58    63           63    +5
10   Alloway Grove        4    60.0    10   20.85    1.5   47    65           65    +18
11   Iqembulabesifazane   3    60.0    11   23.60    2.5   60    63           63    +3
99   Gimme A Ruby         3    60.0    99   0.00     2.5   -     63           63    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Different Drum 57 47 63 -16 2.5 -
2 Silver Slippers Line 63 63 63 ✓ Match 2.5
3 Libran Lana 62 51 68 -17 2.5 -
4 Rose Of Mine 65 58 66 -8 2.5 -
5 Sailaway With Me 67 56 65 -9 2.5 -
6 Sugar Snap 63 59 65 -6 2.5 -
7 Nova Stella 44 48 67 -19 1.5 -
8 Back To Formentera 63 60 64 -4 2.5 -
9 A Foreign Affair 58 49 63 -14 2.5 -
10 Alloway Grove 47 44 65 -21 1.5 -
11 Iqembulabesifazane 60 65 63 +2 2.5 -
99 Gimme A Ruby - 53 63 -10 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