Official NHA Assessment

Race 5: TAB 4RACING APP FM 93 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Doitwithdiamonds
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
3 / 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    Boom Boom            4    52.0    1    0.00     3.5   75    85           75    +0
2    Doitwithdiamonds     4    59.5    2    0.20     3.5   100   100          100   +0
3    Woman's World        4    58.0    3    0.70     3.5   89    102          102   +13
4    Accept Cookies       3    60.0    4    0.95     7.0   94    98           98    +4
5    Kissing Machine      3    55.0    5    1.00     7.0   83    88           88    +5
6    Artic Silver         3    53.0    6    1.10     7.0   80    84           84    +4
7    Warning Sound        3    56.0    7    2.30     7.0   86    88           88    +2
8    Key Worker           3    53.5    8    5.10     7.0   86    81           81    -5
99   Dimako's Jet         4    55.5    99   0.00     3.5   -     92           92    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Boom Boom 75 81 75 +6 3.5 -
2 Doitwithdiamonds Line 100 99 100 -1 3.5
3 Woman's World 89 94 102 -8 3.5 -
4 Accept Cookies 94 94 98 -4 7.0 -
5 Kissing Machine 83 88 88 ✓ Match 7.0 -
6 Artic Silver 80 77 84 -7 7.0 -
7 Warning Sound 86 90 88 +2 7.0 -
8 Key Worker 86 84 81 +3 7.0 -
99 Dimako's Jet - 93 92 +1 3.5 -
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