Official NHA Assessment

Race 8: DOMINIQUE DOS SANTOS MEMORIAL MR 80 HANDICAP (Open)

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Line Horse
Archimides
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 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    High Roller          2    60.0    1    0.00     0.0   81    95           81    +0
2    Rattle Bag           6    60.5    2    1.25     0.0   81    100          100   +19
3    Archimides           3    58.5    3    3.00     8.0   78    78           78    +0
4    American Biscuit     3    58.5    4    4.25     8.0   78    77           77    -1
5    Johnny Dogs          2    56.0    5    6.85     0.0   73    87           87    +14
6    Houston              3    60.0    6    6.95     8.0   81    79           79    -2
7    Mini Coop            3    59.0    7    7.00     8.0   78    77           77    -1
8    Rain Or Shine        4    61.0    8    28.50    5.0   82    87           87    +5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 High Roller 81 86 81 +5 0.0 -
2 Rattle Bag 81 71 100 -29 0.0 -
3 Archimides Line 78 70 78 -8 8.0
4 American Biscuit 78 65 77 -12 8.0 -
5 Johnny Dogs 73 67 87 -20 0.0 -
6 Houston 81 69 79 -10 8.0 -
7 Mini Coop 78 76 77 -1 8.0 -
8 Rain Or Shine 82 82 87 -5 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