Official NHA Assessment

Race 4: BETWAY FM 87 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Boom Boom
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 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    Olivia's Way         3    53.0    1    0.00     9.5   92    65           92    +0
2    Littlemarysunshine   2    62.0    2    1.25     0.0   91    106          106   +15
3    Boom Boom            4    52.5    3    1.75     6.0   74    74           74    +0
4    Ariel's Jet          3    55.0    4    2.00     9.5   79    72           72    -7
5    Darling Harbour      4    54.0    5    2.50     6.0   77    76           76    -1
6    Mighty Goddess       2    54.0    6    4.00     0.0   75    87           87    +12
7    Apache Fighter       4    59.5    7    4.25     6.0   86    86           86    +0
8    Alphabetty           5    55.0    8    5.25     0.0   77    88           88    +11
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Olivia's Way 92 114 92 +22 9.5 -
2 Littlemarysunshine 91 95 106 -11 0.0 -
3 Boom Boom Line 74 81 74 +7 6.0
4 Ariel's Jet 79 69 72 -3 9.5 -
5 Darling Harbour 77 60 76 -16 6.0 -
6 Mighty Goddess 75 73 87 -14 0.0 -
7 Apache Fighter 86 81 86 -5 6.0 -
8 Alphabetty 77 71 88 -17 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