Official NHA Assessment

Race 2: GALLOP TV MR 73 HANDICAP (Open)

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Line Horse
Rock Fall
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
3 / 7
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    True Trojan          3    56.5    1    0.00     9.5   69    48           69    +0
2    Rock Fall            2    61.5    2    4.20     0.0   79    79           79    +0
3    Billy Of Tea         2    53.5    3    5.60     0.0   78    61           68    -10
4    Top Ten              4    48.0    4    7.60     6.0   50    38           40    -10
5    Red Magician         3    52.0    5    11.90    9.5   54    39           44    -10
6    Bally Magic          6    53.5    6    30.70    0.0   60    61           61    +1
99   Take To War          4    53.0    99   0.00     6.0   -     48           48    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 True Trojan 69 64 69 -5 9.5 -
2 Rock Fall Line 79 80 79 +1 0.0
3 Billy Of Tea 78 75 68 +7 0.0 -
4 Top Ten 50 50 40 +10 6.0 -
5 Red Magician 54 49 44 +5 9.5 -
6 Bally Magic 60 60 61 -1 0.0 -
99 Take To War - 59 48 +11 6.0 -
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