Official NHA Assessment

Race 5: PINNACLE PLATE (85) fillies and mares (Race for all horses)

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Line Horse
Differentiate
Reference for assessment
Exact Matches
0 / 4
Calculated = Official
Close Matches
0 / 4
Within 2 points
Significant Diffs
4 / 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    Cordobesa            3    51.0    1    0.00     3.5   64    54           54    -10
2    Seven Seas           5    60.0    2    0.25     0.0   85    79           79    -6
3    Differentiate        5    51.0    3    6.25     0.0   61    61           61    +0
4    Obscure              4    55.5    4    6.30     1.5   72    67           67    -5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cordobesa 64 73 54 +19 3.5 -
2 Seven Seas 85 90 79 +11 0.0 -
3 Differentiate Line 61 72 61 +11 0.0
4 Obscure 72 87 67 +20 1.5 -
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