Official NHA Assessment

Race 6: DAHLIA PLATE (Listed) (For 2 year-olds. R100 000 Win BSA Bonus Series)

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Line Horse
Play Act
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
10 / 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    Kingdundee           3    60.0    1    0.00     2.5   -     -2           -     +0
2    Happy Holly          2    57.5    2    0.10     1.5   -     -5           -     +0
3    Play Act             2    60.0    3    4.35     1.5   -     -            -     +0
4    Family Law           2    60.0    4    4.45     1.5   -     -            -     +0
5    Silvonian            3    60.0    5    7.45     2.5   -     -2           -     +0
6    Eat Prey Love        3    57.5    6    7.70     2.5   -     -7           -     +0
7    Blue Palace          2    57.5    7    8.95     1.5   -     -5           -     +0
8    Havana Grey          3    57.5    8    9.20     2.5   -     -7           -     +0
9    Ravilious            3    60.0    9    13.45    2.5   -     -2           -     +0
10   Hideki               2    60.0    10   16.70    1.5   -     -            -     +0
11   Frosty Reception     3    57.5    11   21.45    2.5   -     -7           -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Kingdundee - 127 - +127 2.5 -
2 Happy Holly - 89 - +89 1.5 -
3 Play Act Line - 80 - +80 1.5
4 Family Law - 100 - +100 1.5 -
5 Silvonian - 86 - +86 2.5 -
6 Eat Prey Love - 71 - +71 2.5 -
7 Blue Palace - 69 - +69 1.5 -
8 Havana Grey - 68 - +68 2.5 -
9 Ravilious - 81 - +81 2.5 -
10 Hideki - - - - 1.5 -
11 Frosty Reception - 63 - +63 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