Official NHA Assessment

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

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Line Horse
The Us Of A
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
11 / 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    Surge Of Power       2    57.0    1    0.00     2.0   -     73           6     +6
2    The Us Of A          3    60.0    2    0.10     3.0   77    77           77    +0
3    Eight On Eighteen    2    57.0    3    1.60     2.0   -     73           73    +73
4    Noon Day Gun         4    60.0    4    3.85     3.5   75    76           76    +1
5    Late December        2    57.0    5    5.35     2.0   -     73           73    +73
6    Gripen               4    60.0    6    7.35     3.5   -     76           76    +76
7    Captain Fj           2    57.0    7    11.35    2.0   -     73           73    +73
8    Dreamalittledream    3    60.0    8    11.75    3.0   -     77           77    +77
9    We Have Touchdown    3    57.0    9    13.00    3.0   -     71           71    +71
10   Wazzup               2    60.0    10   16.50    2.0   78    79           79    +1
11   Rare Onyx            3    60.0    11   22.00    3.0   -     77           77    +77
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Surge Of Power - 80 6 +74 2.0 -
2 The Us Of A Line 77 104 77 +27 3.0
3 Eight On Eighteen - 129 73 +56 2.0 -
4 Noon Day Gun 75 66 76 -10 3.5 -
5 Late December - 87 73 +14 2.0 -
6 Gripen - 58 76 -18 3.5 -
7 Captain Fj - - 73 -73 2.0 -
8 Dreamalittledream - 66 77 -11 3.0 -
9 We Have Touchdown - 89 71 +18 3.0 -
10 Wazzup 78 72 79 -7 2.0 -
11 Rare Onyx - 34 77 -43 3.0 -
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