Official NHA Assessment

Race 4: 4RACING THANKS AND APPRECIATES TYRONE ZACKEY STABLE MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Solo Diva
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
7 / 10
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    Summer Of Dreams     2    60.0    1    0.00     0.0   62    68           68    +6
2    Azaleas For All      4    56.0    2    5.25     0.5   -     59           59    +59
3    Solo Diva            3    60.0    3    8.75     1.0   66    66           66    +0
4    Atchison Topeka      3    60.0    4    11.00    1.0   51    66           66    +15
5    Lorna Lilly          3    60.0    5    12.25    1.0   54    66           66    +12
6    Bad Hair Day         2    57.5    6    16.50    0.0   35    63           63    +28
7    Dame Colleen         3    60.0    7    23.50    1.0   50    66           66    +16
8    Zietgeist            2    56.0    8    99.99    0.0   -     60           60    +60
99   Janet's Gem          2    56.0    99   0.00     0.0   -     60           60    +0
99   Aunt Pittypat        3    60.0    99   0.00     1.0   -     66           66    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Summer Of Dreams 62 65 68 -3 0.0 -
2 Azaleas For All - 82 59 +23 0.5 -
3 Solo Diva Line 66 65 66 -1 1.0
4 Atchison Topeka 51 51 66 -15 1.0 -
5 Lorna Lilly 54 50 66 -16 1.0 -
6 Bad Hair Day 35 47 63 -16 0.0 -
7 Dame Colleen 50 46 66 -20 1.0 -
8 Zietgeist - - 60 -60 0.0 -
99 Janet's Gem - 39 60 -21 0.0 -
99 Aunt Pittypat - 65 66 -1 1.0 -
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