Official NHA Assessment

Race 7: MERANTI PHARMACY MR 74 HANDICAP (Open)

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Line Horse
Trafalgar Square
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
7 / 10
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    Cavalieri            5    58.0    1    0.00     0.0   70    70           70    +0
2    Trade War            3    57.0    2    0.05     3.5   68    61           61    -7
3    Gimme A Rainbow      4    60.5    3    0.55     4.0   75    67           67    -8
4    Trafalgar Square     6    56.5    4    0.75     0.0   67    67           67    +0
5    Purple Operator      3    60.0    5    1.45     3.5   74    67           67    -7
6    One Too Many         3    58.0    6    1.85     3.5   70    63           63    -7
7    Philispiel           7    57.5    7    2.95     0.0   72    69           69    -3
8    Slim Jannie          2    59.0    8    3.15     2.5   80    67           70    -10
9    Ovation              3    55.0    9    4.35     3.5   67    57           57    -10
99   Covert Operator      6    57.0    99   0.00     0.0   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cavalieri 70 73 70 +3 0.0 -
2 Trade War 68 70 61 +9 3.5 -
3 Gimme A Rainbow 75 74 67 +7 4.0 -
4 Trafalgar Square Line 67 69 67 +2 0.0
5 Purple Operator 74 74 67 +7 3.5 -
6 One Too Many 70 79 63 +16 3.5 -
7 Philispiel 72 70 69 +1 0.0 -
8 Slim Jannie 80 95 70 +25 2.5 -
9 Ovation 67 65 57 +8 3.5 -
99 Covert Operator - 77 68 +9 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