Official NHA Assessment

Race 1: #THISISRACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Miss Tango
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Miss Tango           2    57.0    1    0.00     0.0   68    68           68    +0
2    Batik                3    60.0    2    2.20     8.5   46    60           60    +14
3    Voshaarnooi          2    57.0    3    3.20     0.0   55    70           70    +15
4    Double Joy           2    57.0    4    4.70     0.0   -     68           68    +68
5    Hertzoggie           2    57.0    5    5.40     0.0   65    68           68    +3
6    Dame Colleen         3    60.5    6    5.70     8.5   51    58           58    +7
7    Mapule               2    57.5    7    7.00     0.0   -     69           69    +69
8    Ultima Ictu          2    57.0    8    7.70     0.0   64    68           68    +4
9    Bad Hair Day         2    57.0    9    10.00    0.0   -     68           68    +68
10   Princess Zee         2    57.0    10   38.00    0.0   30    68           68    +38
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Miss Tango Line 68 69 68 +1 0.0
2 Batik 46 57 60 -3 8.5 -
3 Voshaarnooi 55 50 70 -20 0.0 -
4 Double Joy - 44 68 -24 0.0 -
5 Hertzoggie 65 58 68 -10 0.0 -
6 Dame Colleen 51 46 58 -12 8.5 -
7 Mapule - 49 69 -20 0.0 -
8 Ultima Ictu 64 60 68 -8 0.0 -
9 Bad Hair Day - 47 68 -21 0.0 -
10 Princess Zee 30 30 68 -38 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