Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION CLASSIFIED STAKES (For horses with nett rating of 71 and below)

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Line Horse
Drengs Ferry
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
6 / 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    Young Nelson         3    56.0    1    0.00     10.0  65    62           62    -3
2    Jack And Ginger      4    60.0    2    1.75     7.0   68    81           81    +13
3    Wildest Dreams       3    57.5    3    3.25     10.0  72    68           68    -4
4    Crafty Heart         4    55.5    4    3.30     7.0   65    70           70    +5
5    Humble Tune          4    60.0    5    3.40     7.0   70    79           79    +9
6    Drengs Ferry         3    58.0    6    4.15     10.0  68    68           68    +0
7    Keepingthepeace      4    57.5    7    9.40     7.0   68    71           71    +3
8    Silvia Louise        4    52.0    8    11.90    7.0   56    60           60    +4
9    The Reflex           2    52.0    9    13.15    0.0   72    74           74    +2
10   Mike The Pilot       3    52.0    10   20.40    10.0  54    54           54    +0
11   Amell                3    56.0    11   21.65    10.0  63    62           62    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Young Nelson 65 62 62 ✓ Match 10.0 -
2 Jack And Ginger 68 63 81 -18 7.0 -
3 Wildest Dreams 72 87 68 +19 10.0 -
4 Crafty Heart 65 63 70 -7 7.0 -
5 Humble Tune 70 58 79 -21 7.0 -
6 Drengs Ferry Line 68 62 68 -6 10.0
7 Keepingthepeace 68 66 71 -5 7.0 -
8 Silvia Louise 56 51 60 -9 7.0 -
9 The Reflex 72 71 74 -3 0.0 -
10 Mike The Pilot 54 50 54 -4 10.0 -
11 Amell 63 63 62 +1 10.0 -
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