Official NHA Assessment

Race 4: GALLOP FORM CLASS 4 (Open. Benchmark at 60.0kg = 80)

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Line Horse
Kimball O'Hara
Reference for assessment
Exact Matches
0 / 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    Amor Fati            2    60.0    1    0.00     0.0   82    77           77    -5
2    Kimball O'Hara       2    55.0    2    1.40     0.0   70    70           70    +0
3    Greenhouse           3    56.0    3    1.90     0.5   74    71           71    -3
4    Givethatmanabells    4    55.0    4    2.05     0.5   70    69           69    -1
5    Rooster Bradshaw     3    59.5    5    2.85     0.5   81    77           77    -4
6    Firelighter          3    55.5    6    4.05     0.5   73    68           68    -5
7    Danube               3    53.5    7    4.75     0.5   77    63           67    -10
8    Ralph The Rascal     8    55.0    8    5.35     0.0   73    67           67    -6
9    Grand Appeal         3    56.0    9    5.40     0.5   74    68           68    -6
10   Dancing On A Cloud   3    59.0    10   5.80     0.5   80    74           74    -6
11   Burning Man          3    60.0    11   6.10     0.5   82    76           76    -6
12   Run The World        3    56.5    12   8.00     0.5   75    69           69    -6
99   Lucky Dollar         2    58.0    99   0.00     0.0   -     73           73    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Amor Fati 82 92 77 +15 0.0 -
2 Kimball O'Hara Line 70 61 70 -9 0.0
3 Greenhouse 74 73 71 +2 0.5 -
4 Givethatmanabells 70 70 69 +1 0.5 -
5 Rooster Bradshaw 81 78 77 +1 0.5 -
6 Firelighter 73 63 68 -5 0.5 -
7 Danube 77 76 67 +9 0.5 -
8 Ralph The Rascal 73 73 67 +6 0.0 -
9 Grand Appeal 74 77 68 +9 0.5 -
10 Dancing On A Cloud 80 70 74 -4 0.5 -
11 Burning Man 82 74 76 -2 0.5 -
12 Run The World 75 60 69 -9 0.5 -
99 Lucky Dollar - 85 73 +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