Official NHA Assessment

Race 2: TAB TELEBET 0861 000 822 MAIDEN PLATE (F & M) ()

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Line Horse
Flying Hafla
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    Key Worker           3    56.0    1    0.00     10.0  81    -20          -     -81
2    Perform              2    60.0    2    3.50     0.0   53    9            43    -10
3    Flying Hafla         2    56.0    3    6.75     0.0   -     -            -     +0
4    Butternutenrooiwyn   2    60.0    4    13.00    0.0   62    8            52    -10
5    Enchanted Royal      3    56.0    5    16.00    10.0  57    -20          47    -10
6    Captains Clover      2    56.0    6    16.75    0.0   63    -            58    -5
99   Sapphire Rain        2    56.0    99   0.00     0.0   -     -            -     +0
99   Tipperary            3    56.0    99   0.00     10.0  -     -20          -20   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Key Worker 81 84 - +84 10.0 -
2 Perform 53 54 43 +11 0.0 -
3 Flying Hafla Line - 73 - +73 0.0
4 Butternutenrooiwyn 62 60 52 +8 0.0 -
5 Enchanted Royal 57 49 47 +2 10.0 -
6 Captains Clover 63 54 58 -4 0.0 -
99 Sapphire Rain - - - - 0.0 -
99 Tipperary - 64 -20 +84 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