Official NHA Assessment

Race 3: TAKE A BET WINA NUMBA NUMBA MR 96 OPEN HANDICAP (3 year olds) (Open)

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Line Horse
Grey Jet
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 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    Potberrie            2    55.5    1    0.00     0.0   86    98           86    +0
2    Grey Jet             3    58.5    2    2.40     5.0   96    96           96    +0
3    Ombudsman            3    53.5    3    9.70     5.0   83    84           84    +1
4    Tintamarre           3    56.5    4    10.00    5.0   89    90           90    +1
5    Lava Fire            3    52.0    5    24.25    5.0   80    81           81    +1
6    Zip Code             3    58.0    6    99.99    5.0   92    93           93    +1
99   Guerilla Warfare     3    53.5    99   0.00     5.0   -     84           84    +0
99   Bay Empire           2    54.5    99   0.00     0.0   -     96           96    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Potberrie 86 105 86 +19 0.0 -
2 Grey Jet Line 96 108 96 +12 5.0
3 Ombudsman 83 83 84 -1 5.0 -
4 Tintamarre 89 88 90 -2 5.0 -
5 Lava Fire 80 69 81 -12 5.0 -
6 Zip Code 92 77 93 -16 5.0 -
99 Guerilla Warfare - 75 84 -9 5.0 -
99 Bay Empire - 62 96 -34 0.0 -
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