Official NHA Assessment

Race 2: MAINE CHANCE FARMS MAJORCA STAKES (WFA) (Grade 1) (For Fillies and Mares at weight for age)

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Line Horse
Double Grand Slam
Reference for assessment
Exact Matches
2 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
3 / 7
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    Rascova              2    60.0    1    0.00     0.0   119   122          122   +3
2    Double Grand Slam    2    60.0    2    0.05     0.0   122   122          122   +0
3    Roccapina            2    55.0    3    1.30     0.0   111   115          115   +4
4    Kinda Wonderful      2    55.0    4    4.80     0.0   104   112          112   +8
5    Fatal Flaw           3    55.0    5    5.55     5.0   115   102          105   -10
6    Scarlet Macaw        2    55.0    6    6.05     0.0   111   112          112   +1
7    Celtic Rumours       5    60.0    7    20.05    0.0   107   122          122   +15
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rascova 119 122 122 ✓ Match 0.0 -
2 Double Grand Slam Line 122 122 122 ✓ Match 0.0
3 Roccapina 111 109 115 -6 0.0 -
4 Kinda Wonderful 104 108 112 -4 0.0 -
5 Fatal Flaw 115 118 105 +13 5.0 -
6 Scarlet Macaw 111 107 112 -5 0.0 -
7 Celtic Rumours 107 104 122 -18 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