Official NHA Assessment

Race 5: TAB 4RACING APP GRADUATION PLATE (For 1 & 2 Time Winners & Maidens)

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Line Horse
One Fine Winter
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
3 / 9
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    One Fine Winter      2    57.5    1    0.00     4.0   105   105          105   +0
2    Yippee Kiyay         2    60.0    2    0.25     4.0   101   110          110   +9
3    Winds Of Change      3    59.5    3    0.55     6.0   117   105          107   -10
4    Bjorn Ironside       2    60.0    4    0.60     4.0   105   110          110   +5
5    Single Combat        3    57.0    5    5.80     6.0   79    100          100   +21
6    Rondebosch           3    56.5    6    9.00     6.0   97    99           99    +2
7    King Harald          2    57.0    7    9.50     4.0   109   104          104   -5
99   Princess Lola        2    54.0    99   0.00     4.0   -     98           98    +0
99   Vamanos              2    54.5    99   0.00     4.0   -     99           99    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 One Fine Winter Line 105 105 105 ✓ Match 4.0
2 Yippee Kiyay 101 105 110 -5 4.0 -
3 Winds Of Change 117 102 107 -5 6.0 -
4 Bjorn Ironside 105 105 110 -5 4.0 -
5 Single Combat 79 79 100 -21 6.0 -
6 Rondebosch 97 95 99 -4 6.0 -
7 King Harald 109 102 104 -2 4.0 -
99 Princess Lola - 60 98 -38 4.0 -
99 Vamanos - 87 99 -12 4.0 -
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