Official NHA Assessment

Race 5: TABGOLD SCORE 6 SCORE 8 SCORE 10 D STAKES (For All Horses with a nett rating of 69 & below)

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Line Horse
Numzaan
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
5 / 10
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    Eventidor            6    60.0    1    0.00     0.0   68    58           58    -10
2    Bally Magic          6    60.0    2    1.70     0.0   60    61           61    +1
3    Numzaan              2    64.0    3    2.10     0.0   69    69           69    +0
4    Count Marsh          7    55.5    4    2.85     0.0   52    51           51    -1
5    Porfirio             6    64.0    5    3.60     0.0   68    67           67    -1
6    Shiny Bob            4    60.0    6    4.60     0.5   61    57           57    -4
7    Magic Maverick       3    61.5    7    7.90     2.0   66    57           57    -9
8    Elusive Belle        4    53.0    8    13.80    0.5   51    43           43    -8
9    Rastignac            4    60.0    9    15.40    0.5   59    57           57    -2
99   Joan The Wad         4    54.5    99   0.00     0.5   -     46           46    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Eventidor 68 89 58 +31 0.0 -
2 Bally Magic 60 60 61 -1 0.0 -
3 Numzaan Line 69 79 69 +10 0.0
4 Count Marsh 52 52 51 +1 0.0 -
5 Porfirio 68 88 67 +21 0.0 -
6 Shiny Bob 61 60 57 +3 0.5 -
7 Magic Maverick 66 54 57 -3 2.0 -
8 Elusive Belle 51 51 43 +8 0.5 -
9 Rastignac 59 58 57 +1 0.5 -
99 Joan The Wad - 53 46 +7 0.5 -
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