Official NHA Assessment

Race 6: PERFECTLY PLACED APPRENTICE C STAKES (For All Horses with a nett rating of 83 & below)

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Line Horse
Poetic Princess
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
4 / 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    Rattlesnake          3    57.5    1    0.00     10.5  78    81           81    +3
2    Barney Mcgrew        4    57.5    2    0.40     12.0  76    78           78    +2
3    Poetic Princess      3    53.5    3    1.90     10.5  73    73           73    +0
4    Escarpment           4    62.5    4    3.90     12.0  82    88           88    +6
5    African Memoir       3    60.0    5    4.65     10.5  79    86           86    +7
6    Gravity              4    48.5    6    6.40     12.0  60    60           60    +0
7    In A Timely Manner   2    58.5    7    7.15     7.0   87    90           90    +3
8    Casa Estiva          3    57.5    8    8.65     10.5  79    81           81    +2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rattlesnake 78 85 81 +4 10.5 -
2 Barney Mcgrew 76 69 78 -9 12.0 -
3 Poetic Princess Line 73 61 73 -12 10.5
4 Escarpment 82 79 88 -9 12.0 -
5 African Memoir 79 68 86 -18 10.5 -
6 Gravity 60 63 60 +3 12.0 -
7 In A Timely Manner 87 92 90 +2 7.0 -
8 Casa Estiva 79 79 81 -2 10.5 -
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