Official NHA Assessment

Race 4: WWW.HIGHVELDRACING.CO.ZA MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Silver Clock
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
0 / 13
Within 2 points
Significant Diffs
13 / 13
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    Rose For Trippi      2    57.0    1    0.00     1.5   -     -            -     +0
2    Silver Clock         2    57.0    2    1.25     1.5   -     -            -     +0
3    Bird In Space        2    57.0    3    1.50     1.5   -     -            -     +0
4    Damned If I Do       2    55.5    4    3.00     1.5   -     -3           -     +0
5    Inventrix            2    57.0    5    4.75     1.5   -     -            -     +0
6    Smelting             7    60.0    6    5.00     0.0   56    9            46    -10
7    Heartlight           2    57.0    7    5.10     1.5   -     -            -     +0
8    Up The Irish         2    53.0    8    6.10     1.5   -     -8           -     +0
9    Covert Action        2    57.0    9    8.50     1.5   -     -            -     +0
10   Apache Love          2    57.0    10   10.50    1.5   -     -            -     +0
11   Princess Zenobia     2    55.5    11   12.25    1.5   -     -3           -     +0
99   Lazer Grace          3    60.0    99   0.00     2.5   -     4            4     +0
99   Ebullience           3    60.0    99   0.00     2.5   -     4            4     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rose For Trippi - 80 - +80 1.5 -
2 Silver Clock Line - 67 - +67 1.5
3 Bird In Space - 66 - +66 1.5 -
4 Damned If I Do - 62 - +62 1.5 -
5 Inventrix - 73 - +73 1.5 -
6 Smelting 56 52 46 +6 0.0 -
7 Heartlight - 48 - +48 1.5 -
8 Up The Irish - 66 - +66 1.5 -
9 Covert Action - 58 - +58 1.5 -
10 Apache Love - 45 - +45 1.5 -
11 Princess Zenobia - 49 - +49 1.5 -
99 Lazer Grace - 44 4 +40 2.5 -
99 Ebullience - 49 4 +45 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