Official NHA Assessment

Race 2: OK MONEY WAVE MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Walker Bay
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
5 / 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   -     -8           -     +0
2    Empress Of Jade      3    57.5    2    0.50     1.0   55    -4           45    -10
3    Walker Bay           3    60.0    3    1.25     1.0   -     -            -     +0
4    Karoo Winter         4    57.5    4    3.75     0.5   43    -7           33    -10
5    Windsor Lane (ZIM)   4    57.5    5    8.75     0.5   -     -8           -     +0
6    Cario                4    60.0    6    16.75    0.5   47    -3           37    -10
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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 - +89 0.0 -
2 Empress Of Jade 55 73 45 +28 1.0 -
3 Walker Bay Line - 59 - +59 1.0
4 Karoo Winter 43 56 33 +23 0.5 -
5 Windsor Lane (ZIM) - 49 - +49 0.5 -
6 Cario 47 41 37 +4 0.5 -
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