Official NHA Assessment

Race 5: OK CUSTOMERS MERIT RATED 80 HANDICAP (Open)

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Line Horse
Karvani
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
6 / 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    Shesalegend          4    56.0    1    0.00     1.0   72    67           72    +0
2    Tulip Way            5    58.5    2    0.05     0.0   77    74           74    -3
3    Karvani              7    55.5    3    2.05     0.0   71    71           71    +0
4    Jubilee              7    60.0    4    2.10     0.0   80    80           80    +0
5    Viscountess Vivien   6    52.0    5    3.10     0.0   64    63           63    -1
6    Wild Heritage        5    56.0    6    4.60     0.0   72    69           69    -3
7    Magic Mike           6    58.0    7    4.70     0.0   76    73           73    -3
8    Magic Vision         5    55.0    8    8.20     0.0   70    67           67    -3
9    Cordobesa            3    54.5    9    28.20    2.0   73    62           63    -10
99   Regulate             3    55.5    99   0.00     2.0   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Shesalegend 72 74 72 +2 1.0 -
2 Tulip Way 77 80 74 +6 0.0 -
3 Karvani Line 71 73 71 +2 0.0
4 Jubilee 80 72 80 -8 0.0 -
5 Viscountess Vivien 64 72 63 +9 0.0 -
6 Wild Heritage 72 71 69 +2 0.0 -
7 Magic Mike 76 67 73 -6 0.0 -
8 Magic Vision 70 64 67 -3 0.0 -
9 Cordobesa 73 73 63 +10 2.0 -
99 Regulate - 79 64 +15 2.0 -
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