Official NHA Assessment

Race 6: RACING240 MAIDEN HANDICAP (For Maidens with 3 or more runs)

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Line Horse
Double Duet
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
3 / 13
Within 2 points
Significant Diffs
7 / 13
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    High Dudgeon         3    55.0    1    0.00     4.5   64    61           64    +0
2    Twice The Master     3    52.0    2    1.50     4.5   47    58           58    +11
3    Double Duet          3    57.0    3    1.90     4.5   68    68           68    +0
4    Keep Shining         3    54.0    4    2.40     4.5   62    61           61    -1
5    Douglas              4    58.5    5    3.90     2.0   62    74           74    +12
6    Clap Of Thunder      3    60.0    6    4.65     4.5   74    71           71    -3
7    Guy Alexander        3    54.5    7    5.65     4.5   62    60           60    -2
8    Golden Grace         3    52.0    8    5.95     4.5   58    55           55    -3
9    Secretary Of State   3    53.0    9    6.35     4.5   60    57           57    -3
10   I'm In Charge        3    52.0    10   8.60     4.5   46    55           55    +9
11   Dog Detachment       4    53.0    11   99.99    2.0   51    62           62    +11
99   Magic Moments        3    57.5    99   0.00     4.5   -     66           66    +0
99   Aeneas               3    58.0    99   0.00     4.5   -     67           67    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 High Dudgeon 64 72 64 +8 4.5 -
2 Twice The Master 47 58 58 ✓ Match 4.5 -
3 Double Duet Line 68 62 68 -6 4.5
4 Keep Shining 62 64 61 +3 4.5 -
5 Douglas 62 52 74 -22 2.0 -
6 Clap Of Thunder 74 66 71 -5 4.5 -
7 Guy Alexander 62 72 60 +12 4.5 -
8 Golden Grace 58 52 55 -3 4.5 -
9 Secretary Of State 60 56 57 -1 4.5 -
10 I'm In Charge 46 40 55 -15 4.5 -
11 Dog Detachment 51 60 62 -2 2.0 -
99 Magic Moments - 47 66 -19 4.5 -
99 Aeneas - 82 67 +15 4.5 -
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