Official NHA Assessment

Race 7: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 WORK RIDERS CLASSIFIED STAKES (For All Horses)

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Line Horse
Zip Code
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
2 / 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    Ariovistus           3    62.0    1    0.00     2.5   79    74           74    -5
2    Real Stunner         3    58.0    2    3.50     2.5   71    69           69    -2
3    Cartagena            4    59.0    3    3.80     1.0   77    73           73    -4
4    Zip Code             3    60.0    4    4.00     2.5   72    72           72    +0
5    American Rebel       4    62.5    5    7.40     1.0   80    78           78    -2
6    Naretoi              2    58.0    6    12.90    0.0   71    71           71    +0
7    Hopscotch            2    52.5    7    16.90    0.0   66    60           60    -6
8    Red Sparrow          3    50.0    8    19.00    2.5   54    50           50    -4
9    Pepper Tree          2    52.0    9    99.99    0.0   67    59           59    -8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ariovistus 79 85 74 +11 2.5 -
2 Real Stunner 71 71 69 +2 2.5 -
3 Cartagena 77 77 73 +4 1.0 -
4 Zip Code Line 72 72 72 ✓ Match 2.5
5 American Rebel 80 78 78 ✓ Match 1.0 -
6 Naretoi 71 68 71 -3 0.0 -
7 Hopscotch 66 62 60 +2 0.0 -
8 Red Sparrow 54 54 50 +4 2.5 -
9 Pepper Tree 67 67 59 +8 0.0 -
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