Official NHA Assessment

Race 7: CLASSIC DAY 5 MARCH FM 83 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Opera Glass
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
5 / 11
Within 2 points
Significant Diffs
3 / 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    Woman Of Substance   3    56.0    1    0.00     4.5   84    65           84    +0
2    Castle Durrow        4    58.5    2    0.25     2.0   80    75           75    -5
3    Opera Glass          4    59.5    3    0.30     2.0   82    82           82    +0
4    Traveling Wilbury    4    59.5    4    1.75     2.0   82    80           80    -2
5    Flying First Class   4    54.5    5    1.80     2.0   72    70           70    -2
6    Aryaam               4    56.0    6    4.00     2.0   75    71           71    -4
7    Astral Plane         4    54.5    7    5.50     2.0   72    67           67    -5
8    Mirren               4    55.5    8    8.00     2.0   74    69           69    -5
9    You Deserve It       4    56.5    9    8.05     2.0   76    71           71    -5
10   Pomander             5    60.0    10   8.05     0.0   83    82           82    -1
99   Snow Palace          5    56.5    99   0.00     0.0   -     75           75    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Woman Of Substance 84 62 84 -22 4.5 -
2 Castle Durrow 80 71 75 -4 2.0 -
3 Opera Glass Line 82 81 82 -1 2.0
4 Traveling Wilbury 82 80 80 ✓ Match 2.0 -
5 Flying First Class 72 82 70 +12 2.0 -
6 Aryaam 75 71 71 ✓ Match 2.0 -
7 Astral Plane 72 62 67 -5 2.0 -
8 Mirren 74 67 69 -2 2.0 -
9 You Deserve It 76 67 71 -4 2.0 -
10 Pomander 83 83 82 +1 0.0 -
99 Snow Palace - 87 75 +12 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