Official NHA Assessment

Race 4: BETWAY MAIDEN PLATE (3-year-old Fillies) (For Maiden 3yof. R15 000 Win bonus ROA Members)

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Line Horse
Intro
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
4 / 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    Shake It             2    60.0    1    0.00     6.5   -     73           6     +6
2    Intro                3    60.0    2    2.75     9.5   67    67           67    +0
3    Sweet Sophia         3    57.5    3    7.25     9.5   -     62           62    +62
4    Explosive Gift       3    60.0    4    7.75     9.5   -     67           67    +67
5    Anne Of Denmark      3    60.0    5    8.75     9.5   -     67           67    +67
6    Denim Blue           3    60.0    6    99.99    9.5   -     67           67    +67
99   Faithful Mistress    3    60.0    99   0.00     9.5   -     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 Shake It - 79 6 +73 6.5 -
2 Intro Line 67 66 67 -1 9.5
3 Sweet Sophia - 58 62 -4 9.5 -
4 Explosive Gift - 56 67 -11 9.5 -
5 Anne Of Denmark - - 67 -67 9.5 -
6 Denim Blue - 52 67 -15 9.5 -
99 Faithful Mistress - 70 67 +3 9.5 -
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