Official NHA Assessment

Race 4: CHRIS HAYNES MIDDLE STAKES (For horses with nett rating of 105 and below)

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Line Horse
Karate Kid
Reference for assessment
Exact Matches
2 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
4 / 8
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    Sheldon              6    62.0    1    0.00     0.0   102   126          108   +6
2    Karate Kid           3    62.0    2    0.25     10.5  105   105          105   +0
3    Silver Tudor         5    58.0    3    3.55     0.0   95    118          118   +23
4    The Abdicator (IRE)  4    58.0    4    4.30     12.0  95    94           94    -1
5    Cosmic Star          3    62.0    5    5.00     10.5  103   105          105   +2
6    Tsar Bomba           3    58.0    6    5.90     10.5  95    97           97    +2
99   Mojo Man             4    54.0    99   0.00     12.0  -     86           86    +0
99   Red Bomber           2    62.0    99   0.00     7.0   -     112          112   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sheldon 102 106 108 -2 0.0 -
2 Karate Kid Line 105 103 105 -2 10.5
3 Silver Tudor 95 99 118 -19 0.0 -
4 The Abdicator (IRE) 95 94 94 ✓ Match 12.0 -
5 Cosmic Star 103 105 105 ✓ Match 10.5 -
6 Tsar Bomba 95 91 97 -6 10.5 -
99 Mojo Man - 80 86 -6 12.0 -
99 Red Bomber - 86 112 -26 7.0 -
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