Official NHA Assessment

Race 6: RACING240 FM 78 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Perfect Trust
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
4 / 11
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    Academic Gold        5    58.0    1    0.00     0.0   74    74           74    +0
2    Perfect Trust        7    59.0    2    5.25     0.0   76    76           76    +0
3    Enchanted Creek      5    52.5    3    5.45     0.0   61    63           63    +2
4    Rosie Roan           4    52.0    4    5.65     0.5   61    61           61    +0
5    Irish Wildflower     3    56.0    5    7.15     1.0   72    68           68    -4
6    Daughter Of Zeus     4    60.5    6    7.55     0.5   79    78           78    -1
7    Raising Quinn        3    58.5    7    9.05     1.0   77    73           73    -4
8    Island Treasure      3    61.0    8    10.05    1.0   82    78           78    -4
9    Impressive Queen     3    52.0    9    11.05    1.0   62    60           60    -2
10   Della's Sword        3    53.5    10   19.30    1.0   67    63           63    -4
11   Adderbury Lake (GB)  4    57.0    11   21.30    0.5   72    71           71    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Academic Gold 74 80 74 +6 0.0 -
2 Perfect Trust Line 76 50 76 -26 0.0
3 Enchanted Creek 61 60 63 -3 0.0 -
4 Rosie Roan 61 55 61 -6 0.5 -
5 Irish Wildflower 72 68 68 ✓ Match 1.0 -
6 Daughter Of Zeus 79 82 78 +4 0.5 -
7 Raising Quinn 77 69 73 -4 1.0 -
8 Island Treasure 82 73 78 -5 1.0 -
9 Impressive Queen 62 59 60 -1 1.0 -
10 Della's Sword 67 56 63 -7 1.0 -
11 Adderbury Lake (GB) 72 72 71 +1 0.5 -
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