Official NHA Assessment

Race 2: 4RACING THANKS AND APPRECIATES SHAYLEN NAIDOO RACING MR 89 HANDICAP (Open)

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Line Horse
Wings Of Nike
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
5 / 6
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    Rainbow Reward       5    55.5    1    0.00     0.0   81    80           81    +0
2    Cosmic Star          3    58.0    2    0.75     1.5   86    82           82    -4
3    Smith And Wesson     2    60.0    3    1.75     0.5   90    88           88    -2
4    Wings Of Nike        6    56.0    4    2.30     0.0   81    81           81    +0
5    Lord Varys           4    55.5    5    2.50     2.0   80    76           76    -4
99   Princeofgreen        2    49.5    99   0.00     0.5   -     67           67    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rainbow Reward 81 89 81 +8 0.0 -
2 Cosmic Star 86 105 82 +23 1.5 -
3 Smith And Wesson 90 73 88 -15 0.5 -
4 Wings Of Nike Line 81 68 81 -13 0.0
5 Lord Varys 80 75 76 -1 2.0 -
99 Princeofgreen - 87 67 +20 0.5 -
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