Official NHA Assessment

Race 6: RACEHORSE OWNERS ASSOCIATION MR 78 HANDICAP (Open)

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Line Horse
Flying First Class
Reference for assessment
Exact Matches
2 / 13
Calculated = Official
Close Matches
4 / 13
Within 2 points
Significant Diffs
7 / 13
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    Rule Book            6    55.5    1    0.00     0.0   75    68           75    +0
2    Fifth Of July        5    58.5    2    1.25     0.0   75    79           79    +4
3    Flying First Class   4    60.0    3    3.25     1.0   78    78           78    +0
4    August Leaves        5    58.5    4    5.50     0.0   75    74           74    -1
5    Arlington Action     6    54.5    5    7.00     0.0   73    66           66    -7
6    She's A Cracker      5    59.0    6    9.25     0.0   76    75           75    -1
7    Smiley River         5    56.0    7    9.35     0.0   70    69           69    -1
8    Madabout Fashion     3    54.5    8    11.50    3.0   76    60           66    -10
9    Pottinger            3    55.5    9    11.75    3.0   75    62           65    -10
10   Go Dream Machine     3    55.5    10   12.75    3.0   74    62           64    -10
11   So Long Spring       7    52.0    11   13.00    0.0   60    61           61    +1
12   Imperious Light      3    52.0    12   14.75    3.0   66    55           56    -10
13   Aryaam               4    58.0    13   15.00    1.0   74    71           71    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rule Book 75 92 75 +17 0.0 -
2 Fifth Of July 75 63 79 -16 0.0 -
3 Flying First Class Line 78 82 78 +4 1.0
4 August Leaves 75 60 74 -14 0.0 -
5 Arlington Action 73 73 66 +7 0.0 -
6 She's A Cracker 76 73 75 -2 0.0 -
7 Smiley River 70 69 69 ✓ Match 0.0 -
8 Madabout Fashion 76 72 66 +6 3.0 -
9 Pottinger 75 70 65 +5 3.0 -
10 Go Dream Machine 74 52 64 -12 3.0 -
11 So Long Spring 60 51 61 -10 0.0 -
12 Imperious Light 66 55 56 -1 3.0 -
13 Aryaam 74 71 71 ✓ Match 1.0 -
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