Official NHA Assessment

Race 6: FOLLOW GOLD CIRCLE ON FACEBOOK MR 74 HANDICAP (Open)

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Line Horse
Kimball O'Hara
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
8 / 11
Within 2 points
Significant Diffs
2 / 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    Sweeper Keeper       4    57.0    1    0.00     3.0   68    57           68    +0
2    Ralph The Rascal     8    60.5    2    0.05     0.0   75    70           70    -5
3    Kimball O'Hara       2    58.5    3    0.30     0.0   71    71           71    +0
4    Brass Bell           8    52.5    4    2.00     0.0   57    57           57    +0
5    Heaven's Will        3    58.5    5    3.00     5.0   74    58           64    -10
6    Future Saint         4    55.5    6    3.50     3.0   65    55           55    -10
7    Lake Como            3    53.5    7    4.30     5.0   61    46           51    -10
8    Whispers Of War (AU  7    58.0    8    6.80     0.0   70    65           65    -5
9    Rhythm               2    59.5    9    8.10     0.0   73    68           68    -5
99   Ultra Quick          6    60.0    99   0.00     0.0   -     69           69    +0
99   Teatime Tipple       2    60.0    99   0.00     0.0   -     69           69    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sweeper Keeper 68 67 68 -1 3.0 -
2 Ralph The Rascal 75 73 70 +3 0.0 -
3 Kimball O'Hara Line 71 61 71 -10 0.0
4 Brass Bell 57 55 57 -2 0.0 -
5 Heaven's Will 74 62 64 -2 5.0 -
6 Future Saint 65 53 55 -2 3.0 -
7 Lake Como 61 61 51 +10 5.0 -
8 Whispers Of War (AUS) 70 64 65 -1 0.0 -
9 Rhythm 73 67 68 -1 0.0 -
99 Ultra Quick - 71 69 +2 0.0 -
99 Teatime Tipple - 69 69 ✓ Match 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