Official NHA Assessment

Race 5: 4RACING.TV MR 78 HANDICAP (Open)

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Line Horse
Arlington Action
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
4 / 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    Lamborghreeni        3    53.0    1    0.00     3.5   70    61           70    +0
2    Arlington Action     6    52.5    2    1.30     0.0   72    72           72    +0
3    Flying First Class   4    60.0    3    1.35     1.5   78    84           84    +6
4    So Long Spring       7    52.0    4    5.70     0.0   60    66           66    +6
5    Go Dream Machine     3    53.5    5    6.50     3.5   71    62           62    -9
6    My True North        4    52.5    6    10.35    1.5   62    64           64    +2
7    Kissed By Fire       4    52.0    7    17.35    1.5   53    63           63    +10
99   Rule Book            6    58.0    99   0.00     0.0   -     78           78    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Lamborghreeni 70 74 70 +4 3.5 -
2 Arlington Action Line 72 73 72 +1 0.0
3 Flying First Class 78 82 84 -2 1.5 -
4 So Long Spring 60 51 66 -15 0.0 -
5 Go Dream Machine 71 52 62 -10 3.5 -
6 My True North 62 61 64 -3 1.5 -
7 Kissed By Fire 53 48 63 -15 1.5 -
99 Rule Book - 92 78 +14 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