Official NHA Assessment

Race 6: TAFTA FM 90 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Aunty Lizzy
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
6 / 9
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    Calulo               4    56.5    1    0.00     4.0   83    92           83    +0
2    Aunty Lizzy          3    52.0    2    1.40     3.5   84    84           84    +0
3    Area Fifty One       3    56.0    3    1.55     3.5   87    92           92    +5
4    Petra                6    60.0    4    2.85     0.0   90    107          107   +17
5    Nikiya               6    56.5    5    3.35     0.0   83    100          100   +17
6    Civil Rights         3    57.5    6    3.55     3.5   90    95           95    +5
7    Lady Catherine       4    57.0    7    3.80     4.0   87    93           93    +6
8    Dunyaa (AUS)         4    52.0    8    5.90     4.0   71    83           83    +12
9    Vivid Jet            4    59.5    9    8.90     4.0   89    98           98    +9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Calulo 83 88 83 +5 4.0 -
2 Aunty Lizzy Line 84 84 84 ✓ Match 3.5
3 Area Fifty One 87 78 92 -14 3.5 -
4 Petra 90 84 107 -23 0.0 -
5 Nikiya 83 75 100 -25 0.0 -
6 Civil Rights 90 88 95 -7 3.5 -
7 Lady Catherine 87 88 93 -5 4.0 -
8 Dunyaa (AUS) 71 71 83 -12 4.0 -
9 Vivid Jet 89 87 98 -11 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