Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY RACING MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Yaya Maria
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
9 / 10
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    Dream Scape          5    60.0    1    0.00     0.0   68    73           70    +2
2    Yaya Maria           2    60.0    2    0.25     0.0   73    73           73    +0
3    Daisy Duke           2    60.0    3    1.00     0.0   76    77           77    +1
4    Dream Star           2    60.0    4    3.50     0.0   66    74           74    +8
5    Lovin' You Baby      2    60.0    5    4.00     0.0   60    74           74    +14
6    Girl Scout           3    60.0    6    4.25     5.0   57    64           64    +7
7    Who Are You          2    60.0    7    5.75     0.0   59    73           73    +14
8    Mia Calice           2    60.0    8    9.50     0.0   63    73           73    +10
9    Mrs Shelby           2    60.0    9    11.75    0.0   52    73           73    +21
99   Short Sharp Shock    3    60.0    99   0.00     5.0   -     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 Dream Scape 68 56 70 -14 0.0 -
2 Yaya Maria Line 73 60 73 -13 0.0
3 Daisy Duke 76 47 77 -30 0.0 -
4 Dream Star 66 61 74 -13 0.0 -
5 Lovin' You Baby 60 58 74 -16 0.0 -
6 Girl Scout 57 54 64 -10 5.0 -
7 Who Are You 59 58 73 -15 0.0 -
8 Mia Calice 63 60 73 -13 0.0 -
9 Mrs Shelby 52 50 73 -23 0.0 -
99 Short Sharp Shock - 62 63 -1 5.0 -
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