Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Silver Tudor
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
11 / 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    Sharapova            5    57.0    1    0.00     0.0   75    -1           -     -75
2    Gimme A Diamond      2    60.0    2    0.20     0.0   72    5            62    -10
3    Free Movement        3    60.0    3    1.30     3.0   -     2            2     +2
4    Silver Tudor         5    57.5    4    4.30     0.0   -     -            -     +0
5    Mambo Come Tesio     3    60.0    5    5.50     3.0   -     -1           -     +0
6    Count Your Chances   5    57.0    6    8.25     0.0   73    -1           63    -10
7    Jitterbugger         3    60.0    7    9.75     3.0   -     -1           -     +0
8    Chicago Lass         6    57.0    8    13.25    0.0   -     -1           -     +0
9    Kilbrannan Sound     2    60.0    9    17.00    0.0   66    5            56    -10
99   Mo The Man           3    60.0    99   0.00     3.0   -     -1           -1    +0
99   Bye Bye Birdie       3    60.0    99   0.00     3.0   -     -1           -1    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sharapova 75 80 - +80 0.0 -
2 Gimme A Diamond 72 54 62 -8 0.0 -
3 Free Movement - 81 2 +79 3.0 -
4 Silver Tudor Line - 99 - +99 0.0
5 Mambo Come Tesio - 80 - +80 3.0 -
6 Count Your Chances 73 51 63 -12 0.0 -
7 Jitterbugger - 56 - +56 3.0 -
8 Chicago Lass - 43 - +43 0.0 -
9 Kilbrannan Sound 66 67 56 +11 0.0 -
99 Mo The Man - 83 -1 +84 3.0 -
99 Bye Bye Birdie - 57 -1 +58 3.0 -
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