Official NHA Assessment

Race 4: TAKE A BET WINA NUMBA NUMBA MR 74 HANDICAP (Open)

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Line Horse
Rattle Bag
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
6 / 10
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    Busstopinhounslow    3    60.5    1    0.00     5.0   85    64           85    +0
2    Rattle Bag           6    59.5    2    1.10     0.0   76    76           76    +0
3    Lava Fire            3    58.5    3    2.50     5.0   81    62           71    -10
4    Blizzard Snow        3    60.5    4    3.80     5.0   85    65           75    -10
5    One Party            3    58.0    5    4.10     5.0   80    60           70    -10
6    Count Your Chances   5    52.0    6    5.80     0.0   52    57           57    +5
7    Bob Lee Swagger      4    53.0    7    9.50     3.0   60    53           53    -7
8    Libeccio             5    58.5    8    10.25    0.0   71    70           70    -1
99   Just Var             4    57.5    99   0.00     3.0   -     62           62    +0
99   Under The Rainbow    3    55.0    99   0.00     5.0   -     53           53    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Busstopinhounslow 85 110 85 +25 5.0 -
2 Rattle Bag Line 76 71 76 -5 0.0
3 Lava Fire 81 69 71 -2 5.0 -
4 Blizzard Snow 85 86 75 +11 5.0 -
5 One Party 80 75 70 +5 5.0 -
6 Count Your Chances 52 51 57 -6 0.0 -
7 Bob Lee Swagger 60 53 53 ✓ Match 3.0 -
8 Libeccio 71 62 70 -8 0.0 -
99 Just Var - 83 62 +21 3.0 -
99 Under The Rainbow - 64 53 +11 5.0 -
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