Official NHA Assessment

Race 1: WSB WELCOMES YOU MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
None identified
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
11 / 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    Antigua Night        2    57.0    1    0.00     1.0   -     -            -     +0
2    Arilena              6    60.0    2    0.75     0.0   -     -            -     +0
3    Silver Mensa         2    57.0    3    2.00     1.0   -     -            -     +0
4    Bird In Space        2    57.0    4    3.00     1.0   -     -            -     +0
5    Simply Magic         3    60.0    5    5.50     2.0   65    -            61    -4
6    Wilkies              2    55.5    6    6.25     1.0   -     -            -     +0
7    Lunar Ballade        3    60.0    7    6.50     2.0   -     -            -     +0
8    Silver Clock         2    55.5    8    7.25     1.0   -     -            -     +0
9    Montana Nymph        2    57.0    9    19.25    1.0   -     -            -     +0
10   Mrs Shelby           2    57.0    10   20.50    1.0   -     -            -     +0
11   Tiny Dancer          2    57.0    11   30.00    1.0   -     -            -     +0
99   In The Ether         6    60.0    99   0.00     0.0   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Antigua Night - 97 - +97 1.0 -
2 Arilena - 75 - +75 0.0 -
3 Silver Mensa - 77 - +77 1.0 -
4 Bird In Space - 66 - +66 1.0 -
5 Simply Magic 65 67 61 +6 2.0 -
6 Wilkies - 50 - +50 1.0 -
7 Lunar Ballade - 72 - +72 2.0 -
8 Silver Clock - 67 - +67 1.0 -
9 Montana Nymph - 57 - +57 1.0 -
10 Mrs Shelby - 50 - +50 1.0 -
11 Tiny Dancer - 35 - +35 1.0 -
99 In The Ether - 63 - - 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