Official NHA Assessment

Race 2: CAPE RACING SALES OPEN MAIDEN (For all Maidens)

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Line Horse
Tom's Diner
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 8
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    Moonacres            2    59.0    1    0.00     0.0   72    73           73    +1
2    Aladdin's Lamp       4    61.0    2    1.75     1.5   -     77           77    +77
3    Red Rackham          3    55.5    3    1.80     2.5   65    64           64    -1
4    Tom's Diner          4    61.0    4    2.80     1.5   76    76           76    +0
5    Portcullis           3    54.0    5    4.55     2.5   62    58           58    -4
6    Lord Quinn           4    53.5    6    4.75     1.5   61    59           59    -2
7    Future Gem           2    55.5    7    9.75     0.0   65    66           66    +1
8    Silver Idol          3    61.0    8    14.00    2.5   -     72           72    +72
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Moonacres 72 66 73 -7 0.0 -
2 Aladdin's Lamp - 106 77 +29 1.5 -
3 Red Rackham 65 63 64 -1 2.5 -
4 Tom's Diner Line 76 94 76 +18 1.5
5 Portcullis 62 63 58 +5 2.5 -
6 Lord Quinn 61 54 59 -5 1.5 -
7 Future Gem 65 55 66 -11 0.0 -
8 Silver Idol - 63 72 -9 2.5 -
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