Official NHA Assessment

Race 7: ZIMBABWE GUINEAS (Grade 3) (For all 3 year olds/ 1st leg Triple Crown)

Line Horse
Lady Sanza
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
3 / 6
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    Call The Wind        3    55.5    1    0.00     3.0   77    59           59    -18
2    Regulate             3    58.0    2    0.25     3.0   60    64           64    +4
3    Lady Sanza           3    55.5    3    4.25     3.0   60    60           60    +0
4    Cutback              6    56.0    4    10.25    0.0   67    66           66    -1
5    Keen Spirit          3    55.5    5    14.25    3.0   61    59           59    -2
6    Manvir               3    58.0    6    19.25    3.0   57    64           64    +7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Call The Wind 77 56 59 -3 3.0 -
2 Regulate 60 79 64 +15 3.0 -
3 Lady Sanza Line 60 58 60 -2 3.0
4 Cutback 67 63 66 -3 0.0 -
5 Keen Spirit 61 71 59 +12 3.0 -
6 Manvir 57 52 64 -12 3.0 -
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