Official NHA Assessment

Race 2: RACING TODAY OPEN MAIDEN (For Maidens. R15 000 Win Bonus ROA Members)

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Line Horse
Oliver Twist
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 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    Karoo Gold           3    61.0    1    0.00     8.0   69    80           75    +6
2    Oliver Twist         3    58.5    2    0.75     8.0   79    79           79    +0
3    Super Casanova       2    52.5    3    2.00     0.0   67    82           82    +15
4    Mayor Of Merrivale   2    57.5    4    2.75     0.0   61    91           91    +30
5    Kamaria              3    52.0    5    6.50     8.0   55    62           62    +7
6    Come On You Spurs    2    56.0    6    9.00     0.0   59    86           86    +27
7    Heart Of Thieves     4    53.5    7    9.05     5.0   53    71           71    +18
8    Mo Ridge             3    55.0    8    11.30    8.0   57    68           68    +11
99   Maxigirl             3    51.5    99   0.00     8.0   -     61           61    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Karoo Gold 69 67 75 -8 8.0 -
2 Oliver Twist Line 79 68 79 -11 8.0
3 Super Casanova 67 60 82 -22 0.0 -
4 Mayor Of Merrivale 61 59 91 -32 0.0 -
5 Kamaria 55 53 62 -9 8.0 -
6 Come On You Spurs 59 51 86 -35 0.0 -
7 Heart Of Thieves 53 45 71 -26 5.0 -
8 Mo Ridge 57 57 68 -11 8.0 -
99 Maxigirl - 61 61 ✓ Match 8.0 -
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