Official NHA Assessment

Race 7: GOLD CIRCLE RACING YOUTUBE CHANNEL MR 67 HANDICAP (Open)

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Line Horse
Purple Operator
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
6 / 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    Gimme A Rainbow      4    59.0    1    0.00     6.0   70    63           70    +0
2    Purple Operator      3    62.0    2    1.60     5.0   71    71           71    +0
3    Hallerbos            3    58.5    3    1.75     5.0   64    64           64    +0
4    Sir Theodore         3    51.5    4    3.85     5.0   55    50           50    -5
5    Joshua Hotsnake      3    61.0    5    3.95     5.0   69    69           69    +0
6    Don Reposado         3    52.5    6    4.10     5.0   52    52           52    +0
7    Movie Magic          6    55.0    7    5.00     0.0   57    67           67    +10
8    Geronimo             4    58.5    8    5.20     6.0   64    62           62    -2
9    Fiery Duke           3    56.5    9    5.25     5.0   60    60           60    +0
10   Lord Edward          2    59.0    10   5.75     3.5   75    68           68    -7
11   Woodstock Festival   6    55.5    11   8.45     0.0   58    68           68    +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gimme A Rainbow 70 74 70 +4 6.0 -
2 Purple Operator Line 71 74 71 +3 5.0
3 Hallerbos 64 57 64 -7 5.0 -
4 Sir Theodore 55 53 50 +3 5.0 -
5 Joshua Hotsnake 69 67 69 -2 5.0 -
6 Don Reposado 52 51 52 -1 5.0 -
7 Movie Magic 57 56 67 -11 0.0 -
8 Geronimo 64 50 62 -12 6.0 -
9 Fiery Duke 60 72 60 +12 5.0 -
10 Lord Edward 75 52 68 -16 3.5 -
11 Woodstock Festival 58 57 68 -11 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