Official NHA Assessment

Race 8: BOOK A TABLE CALL 011-681-1796 CLASSIFIED STAKES (For horses with nett rating of 75 and below)

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Line Horse
After Hours
Reference for assessment
Exact Matches
3 / 13
Calculated = Official
Close Matches
4 / 13
Within 2 points
Significant Diffs
7 / 13
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    Stormy Seas          4    60.0    1    0.00     5.0   72    64           64    -8
2    Great Times          3    53.5    2    0.40     4.5   64    52           54    -10
3    After Hours          7    54.0    3    0.75     0.0   62    62           62    +0
4    South Boy (ARG)      4    60.0    4    1.40     5.0   73    64           64    -9
5    Siberian Steel       3    58.0    5    3.75     4.5   77    61           67    -10
6    Mandalay             3    52.5    6    4.00     4.5   63    50           53    -10
7    Timbavati River      3    56.0    7    5.75     4.5   64    57           57    -7
8    Phinda Mzala         4    56.0    8    6.25     5.0   66    56           56    -10
9    Insatiable           3    58.5    9    7.75     4.5   72    62           62    -10
10   Pendragon            5    54.5    10   9.75     0.0   69    63           63    -6
11   Primula              2    54.5    11   10.75    3.0   71    57           61    -10
12   Black Burner         3    56.0    12   14.00    4.5   65    57           57    -8
99   Silver Mensa         2    58.5    99   0.00     3.0   -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Stormy Seas 72 77 64 +13 5.0 -
2 Great Times 64 54 54 ✓ Match 4.5 -
3 After Hours Line 62 79 62 +17 0.0
4 South Boy (ARG) 73 71 64 +7 5.0 -
5 Siberian Steel 77 80 67 +13 4.5 -
6 Mandalay 63 53 53 ✓ Match 4.5 -
7 Timbavati River 64 79 57 +22 4.5 -
8 Phinda Mzala 66 54 56 -2 5.0 -
9 Insatiable 72 62 62 ✓ Match 4.5 -
10 Pendragon 69 73 63 +10 0.0 -
11 Primula 71 57 61 -4 3.0 -
12 Black Burner 65 60 57 +3 4.5 -
99 Silver Mensa - 77 65 +12 3.0 -
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