Official NHA Assessment

Race 7: RACEHORSE OWNERS ASSOCIATION MR 80 HANDICAP (Open)

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Line Horse
Circle Of Grace
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
7 / 8
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    King's Express       3    59.5    1    0.00     3.0   79    85           79    +0
2    Mardi Gras           7    57.5    2    1.25     0.0   83    91           91    +8
3    Circle Of Grace      4    54.5    3    6.50     1.5   78    78           78    +0
4    Tyrconnell           5    59.0    4    7.25     0.0   78    90           90    +12
5    Celtic Rush          5    58.0    5    8.50     0.0   79    88           88    +9
6    Greenbackcurrency    3    59.5    6    12.75    3.0   79    85           85    +6
7    Calibre Crest        3    55.5    7    14.75    3.0   79    77           77    -2
99   Whorly Whorly        7    58.0    99   0.00     0.0   -     88           88    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 King's Express 79 102 79 +23 3.0 -
2 Mardi Gras 83 83 91 -8 0.0 -
3 Circle Of Grace Line 78 51 78 -27 1.5
4 Tyrconnell 78 82 90 -8 0.0 -
5 Celtic Rush 79 69 88 -19 0.0 -
6 Greenbackcurrency 79 71 85 -14 3.0 -
7 Calibre Crest 79 74 77 -3 3.0 -
99 Whorly Whorly - 78 88 -10 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