Official NHA Assessment

Race 4: RACEHORSE OWNERS ASSOCIATION MR 73 HANDICAP (Open)

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Line Horse
American Landing
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
8 / 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    Magnum Fire          7    59.0    1    0.00     0.0   71    69           71    +0
2    American Landing     7    58.5    2    3.50     0.0   70    70           70    +0
3    Van Gogh             4    60.0    3    5.25     6.0   73    59           63    -10
4    Dirty Martini        4    48.5    4    7.25     6.0   57    36           47    -10
5    Vida Futura          3    57.0    5    7.50     9.5   70    46           60    -10
6    Absolutely Fab       4    52.5    6    9.75     6.0   54    44           44    -10
7    Almas Tower          2    52.5    7    10.00    0.0   77    56           67    -10
8    Miss Otis            3    53.5    8    12.50    9.5   63    39           53    -10
9    With Our Blessing    4    52.5    9    26.00    6.0   43    44           44    +1
10   Humble Tune          4    57.0    10   27.25    6.0   70    53           60    -10
99   Drengs Ferry         3    55.5    99   0.00     9.5   -     43           43    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Magnum Fire 71 59 71 -12 0.0 -
2 American Landing Line 70 80 70 +10 0.0
3 Van Gogh 73 72 63 +9 6.0 -
4 Dirty Martini 57 50 47 +3 6.0 -
5 Vida Futura 70 66 60 +6 9.5 -
6 Absolutely Fab 54 51 44 +7 6.0 -
7 Almas Tower 77 82 67 +15 0.0 -
8 Miss Otis 63 59 53 +6 9.5 -
9 With Our Blessing 43 41 44 -3 6.0 -
10 Humble Tune 70 58 60 -2 6.0 -
99 Drengs Ferry - 62 43 +19 9.5 -
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