Official NHA Assessment

Race 2: RACING TODAY MR 66 HANDICAP (Open)

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Line Horse
The Navy Lark
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 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    Fennec Fox           5    60.0    1    0.00     0.0   66    73           66    +0
2    Pendragon            5    61.0    2    0.20     0.0   68    75           75    +7
3    Dark Tide            5    53.5    3    0.70     0.0   53    60           60    +7
4    The Navy Lark        4    61.0    4    2.70     2.5   70    70           70    +0
5    Warm Winter Nite     2    61.0    5    3.90     1.0   70    73           73    +3
6    Life Goes On         7    55.5    6    5.80     0.0   65    64           64    -1
7    Inafix               4    57.0    7    10.00    2.5   62    62           62    +0
99   Delphi Dancer        3    58.5    99   0.00     2.0   -     66           66    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Fennec Fox 66 64 66 -2 0.0 -
2 Pendragon 68 73 75 -2 0.0 -
3 Dark Tide 53 53 60 -7 0.0 -
4 The Navy Lark Line 70 74 70 +4 2.5
5 Warm Winter Nite 70 92 73 +19 1.0 -
6 Life Goes On 65 54 64 -10 0.0 -
7 Inafix 62 69 62 +7 2.5 -
99 Delphi Dancer - 59 66 -7 2.0 -
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