Official NHA Assessment

Race 10: NEXT TURFFONTEIN RACEMEETING THURSDAY 6 FEBRUARY CLASSIFIED STAKES (For horses with nett rating of 75 and below)

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Line Horse
After Hours
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
6 / 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    Just Var             4    60.0    1    0.00     2.0   72    66           66    -6
2    Sail The Sky         4    56.0    2    1.30     2.0   65    61           61    -4
3    After Hours          7    56.0    3    2.55     0.0   64    64           64    +0
4    Top Seed             2    60.0    4    3.05     0.0   82    72           72    -10
5    Exceedingly Glam     3    58.0    5    10.25    3.0   82    60           72    -10
6    Captain Jim          3    52.0    6    11.85    3.0   58    48           48    -10
7    Count Your Chances   5    50.0    7    13.85    0.0   52    50           50    -2
8    Pendragon            5    60.0    8    14.65    0.0   74    70           70    -4
99   Just Be Nice         3    58.0    99   0.00     3.0   -     60           60    +0
99   Twice As Wild        6    50.0    99   0.00     0.0   -     50           50    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Just Var 72 83 66 +17 2.0 -
2 Sail The Sky 65 62 61 +1 2.0 -
3 After Hours Line 64 79 64 +15 0.0
4 Top Seed 82 82 72 +10 0.0 -
5 Exceedingly Glam 82 78 72 +6 3.0 -
6 Captain Jim 58 54 48 +6 3.0 -
7 Count Your Chances 52 51 50 +1 0.0 -
8 Pendragon 74 73 70 +3 0.0 -
99 Just Be Nice - 73 60 +13 3.0 -
99 Twice As Wild - 51 50 +1 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