Official NHA Assessment

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

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Line Horse
Ginjamatinja
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
4 / 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    Ginjamatinja         3    60.0    1    0.00     1.5   45    45           45    +0
2    Zoe Alexandra (ZIM)  3    57.5    2    1.50     1.5   -     40           40    +40
3    Royal Obsession      3    60.0    3    4.00     1.5   40    45           45    +5
99   Star Aglow           3    57.5    99   0.00     1.5   -     40           40    +0
99   Lady Emma Hamilton   2    54.5    99   0.00     0.5   -     36           36    +0
99   Cario                4    60.0    99   0.00     2.0   -     44           44    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ginjamatinja Line 45 45 45 ✓ Match 1.5
2 Zoe Alexandra (ZIM) - 50 40 +10 1.5 -
3 Royal Obsession 40 37 45 -8 1.5 -
99 Star Aglow - 74 40 +34 1.5 -
99 Lady Emma Hamilton - 57 36 +21 0.5 -
99 Cario - 41 44 -3 2.0 -
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