Official NHA Assessment

Race 7: GLENLAIR TROPHY (For all horses - Non-Black Type)

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Line Horse
Zatara Magic
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
6 / 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    Bournemouth          5    60.0    1    0.00     0.0   108   105          105   -3
2    Juan Carlos          7    52.5    2    2.25     0.0   84    94           94    +10
3    Zatara Magic         5    60.0    3    3.25     0.0   108   108          108   +0
4    Joy And Peace        4    59.5    4    6.50     2.0   112   100          102   -10
5    Woman's World        4    52.5    5    9.50     2.0   93    86           86    -7
6    Great Affair         7    50.0    6    11.00    0.0   63    85           85    +22
7    Official Secret      6    56.0    7    15.50    0.0   104   97           97    -7
8    FireAlley            7    62.0    8    21.00    0.0   110   109          109   -1
99   Downing Seven        5    52.5    99   0.00     0.0   -     90           90    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bournemouth 108 110 105 +5 0.0 -
2 Juan Carlos 84 93 94 -1 0.0 -
3 Zatara Magic Line 108 114 108 +6 0.0
4 Joy And Peace 112 110 102 +8 2.0 -
5 Woman's World 93 94 86 +8 2.0 -
6 Great Affair 63 63 85 -22 0.0 -
7 Official Secret 104 103 97 +6 0.0 -
8 FireAlley 110 107 109 -2 0.0 -
99 Downing Seven - 69 90 -21 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