Official NHA Assessment

Race 2: WIN A JETOUR X70 ON 29 NOVEMBER FM 100 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Doitwithdiamonds
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
2 / 6
Within 2 points
Significant Diffs
1 / 6
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    Accept Cookies       3    55.0    1    0.00     8.0   91    80           91    +0
2    Avoontoast           5    50.0    2    0.50     0.0   85    91           91    +6
3    Doitwithdiamonds     4    60.0    3    1.50     4.5   100   100          100   +0
4    Future Date          2    52.5    4    3.70     0.0   86    92           92    +6
5    Princess Ilaria      5    52.0    5    4.00     0.0   84    91           91    +7
6    Cocomelon            3    57.0    6    8.25     8.0   95    84           85    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Accept Cookies 91 94 91 +3 8.0 -
2 Avoontoast 85 86 91 -5 0.0 -
3 Doitwithdiamonds Line 100 99 100 -1 4.5
4 Future Date 86 93 92 +1 0.0 -
5 Princess Ilaria 84 79 91 -12 0.0 -
6 Cocomelon 95 80 85 -5 8.0 -
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