Official NHA Assessment

Race 7: play.tabonline.co.za CAPE C STAKES (For All Horses with a nett rating of 74 & below)

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Line Horse
Bonanza
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
5 / 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    Wordsworth           7    52.5    1    0.00     0.0   54    73           60    +6
2    Bonanza              3    55.5    2    1.25     8.5   62    62           62    +0
3    William West         2    61.5    3    1.65     5.5   84    80           80    -4
4    Elusive Trader       6    61.5    4    2.65     0.0   74    91           91    +17
5    Musical Arts         2    58.5    5    3.05     5.5   83    74           74    -9
6    Rock On Tommy        3    51.0    6    5.05     8.5   52    53           53    +1
7    Warm Winter Nite     2    60.0    7    5.35     5.5   80    77           77    -3
8    Final Move           3    55.5    8    5.40     8.5   62    62           62    +0
99   Easy Money           4    55.5    99   0.00     10.0  -     59           59    +0
99   Wylie Jack           6    54.0    99   0.00     0.0   -     76           76    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Wordsworth 54 65 60 +5 0.0 -
2 Bonanza Line 62 57 62 -5 8.5
3 William West 84 51 80 -29 5.5 -
4 Elusive Trader 74 72 91 -19 0.0 -
5 Musical Arts 83 75 74 +1 5.5 -
6 Rock On Tommy 52 50 53 -3 8.5 -
7 Warm Winter Nite 80 92 77 +15 5.5 -
8 Final Move 62 50 62 -12 8.5 -
99 Easy Money - 56 59 -3 10.0 -
99 Wylie Jack - 61 76 -15 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