Official NHA Assessment

Race 4: RACING TODAY PINNACLE STAKES (Open to all horses)

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Line Horse
Zatara Magic
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
7 / 12
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    Zatara Magic         5    62.0    1    0.00     0.0   107   107          107   +0
2    Juan Carlos          7    55.0    2    3.25     0.0   81    96           96    +15
3    Official Secret      6    59.5    3    5.25     0.0   107   102          102   -5
4    Anatolian Silver     3    53.5    4    7.00     8.0   80    74           74    -6
5    Spin Doctor          3    56.5    5    7.25     8.0   90    80           80    -10
6    Nebraas              8    61.0    6    7.75     0.0   103   105          105   +2
7    Ellis Island         4    52.0    7    9.00     4.5   66    78           78    +12
8    Downing Seven        5    51.0    8    10.25    0.0   83    85           85    +2
9    Runaway Song         6    61.0    9    10.50    0.0   104   105          105   +1
10   Street Art           3    61.0    10   10.60    8.0   103   89           93    -10
11   Medlers Tart         2    57.0    11   23.10    0.0   96    97           97    +1
99   Bournemouth          5    59.5    99   0.00     0.0   -     102          102   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zatara Magic Line 107 114 107 +7 0.0
2 Juan Carlos 81 93 96 -3 0.0 -
3 Official Secret 107 103 102 +1 0.0 -
4 Anatolian Silver 80 78 74 +4 8.0 -
5 Spin Doctor 90 90 80 +10 8.0 -
6 Nebraas 103 101 105 -4 0.0 -
7 Ellis Island 66 66 78 -12 4.5 -
8 Downing Seven 83 69 85 -16 0.0 -
9 Runaway Song 104 98 105 -7 0.0 -
10 Street Art 103 78 93 -15 8.0 -
11 Medlers Tart 96 92 97 -5 0.0 -
99 Bournemouth - 110 102 +8 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