Official NHA Assessment

Race 5: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 96 HANDICAP (Open)

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Line Horse
Rainbow Reward
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
3 / 7
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    Chyavana             3    61.0    1    0.00     1.5   98    95           98    +0
2    Rainbow Reward       5    55.0    2    0.50     0.0   86    86           86    +0
3    Karangetang          2    59.5    3    2.00     0.5   95    94           94    -1
4    Rollwiththepunches   6    55.5    4    4.25     0.0   92    87           87    -5
5    Super Awesome        4    53.5    5    5.50     2.0   84    79           79    -5
6    Dr Faustus           2    56.5    6    7.50     0.5   90    88           88    -2
99   Smith And Wesson     2    54.0    99   0.00     0.5   -     83           83    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Chyavana 98 106 98 +8 1.5 -
2 Rainbow Reward Line 86 89 86 +3 0.0
3 Karangetang 95 95 94 +1 0.5 -
4 Rollwiththepunches 92 90 87 +3 0.0 -
5 Super Awesome 84 79 79 ✓ Match 2.0 -
6 Dr Faustus 90 78 88 -10 0.5 -
99 Smith And Wesson - 73 83 -10 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