Official NHA Assessment

Race 3: NOVICE PLATE (Maidens & 1 time winners)

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Line Horse
Karoo Winter
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
3 / 6
Within 2 points
Significant Diffs
2 / 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    Why Madera           2    57.0    1    0.00     0.0   -     51           6     +6
2    Karoo Winter         4    57.5    2    0.75     0.5   55    55           55    +0
3    Windsor Lane (ZIM)   4    55.0    3    4.75     0.5   48    46           46    -2
4    Bruce's Spirit       6    58.0    4    6.75     0.0   53    53           53    +0
5    Days Gone By         3    57.5    5    14.75    1.0   55    50           50    -5
6    Mustatheef           3    60.0    6    20.75    1.0   59    55           55    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Why Madera - 89 6 +83 0.0 -
2 Karoo Winter Line 55 56 55 +1 0.5
3 Windsor Lane (ZIM) 48 49 46 +3 0.5 -
4 Bruce's Spirit 53 55 53 +2 0.0 -
5 Days Gone By 55 51 50 +1 1.0 -
6 Mustatheef 59 42 55 -13 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