Official NHA Assessment

Race 2: BET WITH TOTE MAIDEN PLATE (For all Maidens)

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Line Horse
Black Frost
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 7
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    Black Frost          2    58.5    1    0.00     3.5   76    76           76    +0
2    War Emperor          3    60.0    2    1.80     5.0   -     76           76    +76
3    Nebulous             2    55.0    3    2.20     3.5   76    69           69    -7
4    Green Ticket         3    60.0    4    2.30     5.0   -     76           76    +76
5    Hey Diddle Diddle    3    57.5    5    3.10     5.0   -     71           71    +71
6    Mount Kennedy        3    60.0    6    5.10     5.0   66    76           76    +10
7    Captain T            3    60.0    7    10.10    5.0   -     76           76    +76
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Black Frost Line 76 76 76 ✓ Match 3.5
2 War Emperor - 74 76 -2 5.0 -
3 Nebulous 76 77 69 +8 3.5 -
4 Green Ticket - 68 76 -8 5.0 -
5 Hey Diddle Diddle - 68 71 -3 5.0 -
6 Mount Kennedy 66 65 76 -11 5.0 -
7 Captain T - 57 76 -19 5.0 -
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