Official NHA Assessment

Race 4: OPEN A tabGOLD ACCOUNT - 031 314 1874 MR 66 HANDICAP (Open)

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Line Horse
Brave Voyager
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 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    Devils And Dust      2    57.0    1    0.00     0.0   73    63           73    +0
2    Walton Hall          5    52.0    2    0.05     0.0   50    53           53    +3
3    Brave Voyager        3    54.0    3    0.65     4.0   54    54           54    +0
4    Lou Lou The Legend   3    57.0    4    3.85     4.0   68    56           58    -10
5    African Dusk         5    60.5    5    9.95     0.0   75    70           70    -5
6    Cozy Dot Com         5    52.0    6    10.05    0.0   48    53           53    +5
7    Arrow's Mark         6    58.0    7    15.85    0.0   62    65           65    +3
8    Ebony Bay            3    57.5    8    16.45    4.0   72    56           62    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Devils And Dust 73 52 73 -21 0.0 -
2 Walton Hall 50 50 53 -3 0.0 -
3 Brave Voyager Line 54 51 54 -3 4.0
4 Lou Lou The Legend 68 59 58 +1 4.0 -
5 African Dusk 75 83 70 +13 0.0 -
6 Cozy Dot Com 48 47 53 -6 0.0 -
7 Arrow's Mark 62 54 65 -11 0.0 -
8 Ebony Bay 72 50 62 -12 4.0 -
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