Official NHA Assessment

Race 3: RACEHORSE OWNERS ASSOCIATION PLATE (3 year olds)

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Line Horse
Zatara Magic
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
9 / 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    Khaya's Hope         5    58.0    1    0.00     0.0   107   85           85    -22
2    Zatara Magic         5    58.0    2    3.50     0.0   86    86           86    +0
3    Double Destiny       2    55.0    3    4.00     0.0   94    80           84    -10
4    Sand Bank            2    60.0    4    5.25     0.0   95    89           89    -6
5    Can Col              2    58.0    5    6.00     0.0   79    85           85    +6
6    Russian Empire       5    55.5    6    7.75     0.0   78    80           80    +2
7    Then In Focus        2    58.0    7    7.85     0.0   84    85           85    +1
8    Coastal Path         5    58.0    8    10.10    0.0   88    85           85    -3
9    Indy View            2    58.0    9    11.35    0.0   79    85           85    +6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Khaya's Hope 107 114 85 +29 0.0 -
2 Zatara Magic Line 86 114 86 +28 0.0
3 Double Destiny 94 77 84 -7 0.0 -
4 Sand Bank 95 63 89 -26 0.0 -
5 Can Col 79 71 85 -14 0.0 -
6 Russian Empire 78 53 80 -27 0.0 -
7 Then In Focus 84 71 85 -14 0.0 -
8 Coastal Path 88 77 85 -8 0.0 -
9 Indy View 79 76 85 -9 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