Official NHA Assessment

Race 4: BOOK A TABLE CALL 011 681 1796 PINNACLE STAKES (F & M) (For Fillies and Mares)

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Line Horse
Under Your Spell
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 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    Under Your Spell     3    60.0    1    0.00     4.0   114   114          114   +0
2    Humdinger            3    56.0    2    0.10     4.0   103   106          106   +3
3    Queen Of Shadows     3    49.5    3    1.50     4.0   91    96           96    +5
4    Hollywoodbound       3    56.0    4    2.25     4.0   101   109          109   +8
5    Supreme Quest        3    56.0    5    2.30     4.0   101   108          108   +7
6    Clafoutis            3    54.0    6    3.25     4.0   95    104          104   +9
7    Follow Me            3    54.0    7    5.25     4.0   98    102          102   +4
8    Eternal Life         3    52.0    8    9.00     4.0   94    98           98    +4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Under Your Spell Line 114 113 114 -1 4.0
2 Humdinger 103 119 106 +13 4.0 -
3 Queen Of Shadows 91 95 96 -1 4.0 -
4 Hollywoodbound 101 101 109 -8 4.0 -
5 Supreme Quest 101 92 108 -16 4.0 -
6 Clafoutis 95 96 104 -8 4.0 -
7 Follow Me 98 94 102 -8 4.0 -
8 Eternal Life 94 88 98 -10 4.0 -
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