Official NHA Assessment

Race 7: RACEHORSE OWNERS ASSOCIATION GRADUATION PLATE (F & M) (For Maidens, 1 & 2 Time Winners F & M)

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Line Horse
Happy Mo
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 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    Chasing Happiness    3    60.0    1    0.00     10.5  94    92           78    -16
2    Happy Mo             3    57.0    2    1.20     10.5  86    86           86    +0
3    Betula               2    57.0    3    3.25     7.0   98    93           93    -5
4    It's Her Way         3    54.5    4    6.75     10.5  82    81           81    -1
5    Force Eight          3    58.0    5    18.50    10.5  96    88           88    -8
99   Sunshine Day         4    60.0    99   0.00     12.0  -     89           89    +0
99   Dolcezza             2    55.5    99   0.00     7.0   -     90           90    +0
99   Bosum Buddy          3    55.0    99   0.00     10.5  -     82           82    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Chasing Happiness 94 110 78 +32 10.5 -
2 Happy Mo Line 86 89 86 +3 10.5
3 Betula 98 94 93 +1 7.0 -
4 It's Her Way 82 91 81 +10 10.5 -
5 Force Eight 96 77 88 -11 10.5 -
99 Sunshine Day - 69 89 -20 12.0 -
99 Dolcezza - 73 90 -17 7.0 -
99 Bosum Buddy - 85 82 +3 10.5 -
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