Official NHA Assessment

Race 3: MERIT RATED 65 HANDICAP (Open)

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Line Horse
Cool Solution
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
5 / 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    Differentiate        5    60.5    1    0.00     0.0   66    63           66    +0
2    At The Office        6    57.0    2    0.50     0.0   59    61           61    +2
3    Pacific Duke         4    58.5    3    1.25     0.5   62    62           62    +0
4    Cool Solution        9    59.5    4    1.30     0.0   64    64           64    +0
5    Chetan               3    55.0    5    3.30     1.0   57    51           51    -6
6    Albar Warning        3    52.0    6    5.30     1.0   50    44           44    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Differentiate 66 72 66 +6 0.0 -
2 At The Office 59 45 61 -16 0.0 -
3 Pacific Duke 62 49 62 -13 0.5 -
4 Cool Solution Line 64 51 64 -13 0.0
5 Chetan 57 45 51 -6 1.0 -
6 Albar Warning 50 48 44 +4 1.0 -
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