Official NHA Assessment

Race 2: #YOUCANBETONUS! NOVICE PLATE (F & M) (For One-time winners & Maidens (F & M))

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Line Horse
North Star
Reference for assessment
Exact Matches
1 / 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    White Waters         2    60.0    1    0.00     0.0   68    84           74    +6
2    Royal City Girl      2    58.0    2    0.05     0.0   93    80           83    -10
3    North Star           2    58.0    3    1.05     0.0   84    84           84    +0
4    Haze And Smoke       2    57.5    4    2.80     0.0   78    81           81    +3
5    Shori Kai            3    58.0    5    2.90     6.0   72    70           70    -2
99   Twilight Bay         2    60.0    99   0.00     0.0   -     84           84    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 White Waters 68 73 74 -1 0.0 -
2 Royal City Girl 93 93 83 +10 0.0 -
3 North Star Line 84 85 84 +1 0.0
4 Haze And Smoke 78 85 81 +4 0.0 -
5 Shori Kai 72 70 70 ✓ Match 6.0 -
99 Twilight Bay - 72 84 -12 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