Official NHA Assessment

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

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Line Horse
Palace Dancer
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    Palace Dancer        3    58.0    1    0.00     9.5   -     -            -     +0
2    Black Hole Sun       4    60.0    2    3.00     11.0  59    1            49    -10
3    Bilingual            4    60.0    3    5.50     11.0  60    1            50    -10
4    Kit Kat Katie        2    60.0    4    10.75    6.5   64    10           54    -10
5    Chasing The Crown    3    56.5    5    12.50    9.5   -     -3           -     +0
6    Someday Maybe        3    60.0    6    12.75    9.5   58    4            48    -10
99   Bellissivar          2    58.0    99   0.00     6.5   -     6            6     +0
99   Golden Argo          3    60.0    99   0.00     9.5   -     4            4     +0
99   Jadese               2    58.0    99   0.00     6.5   -     6            6     +0
99   Cyber Spirit         2    58.0    99   0.00     6.5   -     6            6     +0
99   Villa Semaya         2    60.0    99   0.00     6.5   -     10           10    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Palace Dancer Line - 88 - +88 9.5
2 Black Hole Sun 59 53 49 +4 11.0 -
3 Bilingual 60 60 50 +10 11.0 -
4 Kit Kat Katie 64 60 54 +6 6.5 -
5 Chasing The Crown - 46 - +46 9.5 -
6 Someday Maybe 58 56 48 +8 9.5 -
99 Bellissivar - 73 6 +67 6.5 -
99 Golden Argo - 61 4 +57 9.5 -
99 Jadese - 47 6 +41 6.5 -
99 Cyber Spirit - 62 6 +56 6.5 -
99 Villa Semaya - 59 10 +49 6.5 -
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