Official NHA Assessment

Race 8: NEXT TURFFONTEIN RACEMEETING SATURDAY 3 SEPTEMBER CLASSIFIED STAKES (For horses with nett rating of 71 and below)

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Line Horse
Great Times
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
9 / 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    Corvette Captain     5    60.0    1    0.00     0.0   70    87           76    +6
2    Back To Basics       3    54.0    2    1.25     9.5   56    56           56    +0
3    Great Times          3    60.0    3    1.35     9.5   68    68           68    +0
4    Power Ranger         7    58.0    4    1.75     0.0   65    83           83    +18
5    The Makwakkers       6    60.0    5    2.50     0.0   69    87           87    +18
6    Silvery Blue         3    56.5    6    3.75     9.5   65    61           61    -4
7    Mix The Magic        3    54.5    7    4.00     9.5   60    57           57    -3
8    Quattro Passi        5    56.0    8    4.25     0.0   62    79           79    +17
9    Risky Business       3    56.5    9    5.25     9.5   66    61           61    -5
10   Earl of Cardigan     3    58.0    10   5.45     9.5   65    64           64    -1
11   Magic Flower         2    58.0    11   6.00     6.5   77    70           70    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Corvette Captain 70 75 76 -1 0.0 -
2 Back To Basics 56 72 56 +16 9.5 -
3 Great Times Line 68 54 68 -14 9.5
4 Power Ranger 65 69 83 -14 0.0 -
5 The Makwakkers 69 68 87 -19 0.0 -
6 Silvery Blue 65 79 61 +18 9.5 -
7 Mix The Magic 60 52 57 -5 9.5 -
8 Quattro Passi 62 62 79 -17 0.0 -
9 Risky Business 66 75 61 +14 9.5 -
10 Earl of Cardigan 65 50 64 -14 9.5 -
11 Magic Flower 77 52 70 -18 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