Official NHA Assessment

Race 4: 4RACING THANKS & APPRECIATES WEICHONG MARWING RACING MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Membe

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Line Horse
Aunt Pittypat
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 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    Silver Hunt          2    55.0    1    0.00     0.0   -     51           6     +6
2    Lady Dynamo          3    60.0    2    0.60     1.5   60    63           63    +3
3    Aunt Pittypat        3    60.0    3    2.10     1.5   61    61           61    +0
4    Dusky Rose           3    60.0    4    3.60     1.5   55    59           59    +4
5    Perform              2    60.0    5    3.85     0.0   58    62           62    +4
6    Spring Of Elixir     3    60.0    6    5.00     1.5   53    58           58    +5
7    Antananarivo         4    60.0    7    7.00     0.5   60    60           60    +0
8    Exquisite Dawn       2    55.0    8    14.50    0.0   -     51           51    +51
9    Shivas Spirit        3    60.0    9    16.75    1.5   49    58           58    +9
10   Janet's Gem          2    55.0    10   34.50    0.0   -     51           51    +51
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Silver Hunt - 71 6 +65 0.0 -
2 Lady Dynamo 60 61 63 -2 1.5 -
3 Aunt Pittypat Line 61 65 61 +4 1.5
4 Dusky Rose 55 58 59 -1 1.5 -
5 Perform 58 54 62 -8 0.0 -
6 Spring Of Elixir 53 55 58 -3 1.5 -
7 Antananarivo 60 57 60 -3 0.5 -
8 Exquisite Dawn - 58 51 +7 0.0 -
9 Shivas Spirit 49 36 58 -22 1.5 -
10 Janet's Gem - 39 51 -12 0.0 -
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