Official NHA Assessment

Race 6: MWOS IPI TOMBE STAKES (Listed) (Weight for Age)

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Line Horse
Holy Land
Reference for assessment
Exact Matches
0 / 4
Calculated = Official
Close Matches
0 / 4
Within 2 points
Significant Diffs
3 / 4
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    Jet Mirage           3    60.0    1    0.00     4.0   100   89           89    -11
2    Brianna              4    57.5    2    0.50     2.0   104   93           94    -10
3    Holy Land            6    60.0    3    0.75     0.0   101   101          101   +0
4    Wantage              8    60.0    4    0.85     0.0   92    101          101   +9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Jet Mirage 100 100 89 +11 4.0 -
2 Brianna 104 103 94 +9 2.0 -
3 Holy Land Line 101 97 101 -4 0.0
4 Wantage 92 78 101 -23 0.0 -
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