Official NHA Assessment

Race 5: WILGERBOSDRIFT PINNACLE STAKES (Open)

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Line Horse
Golden Sickle
Reference for assessment
Exact Matches
2 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
5 / 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    Dreamland            4    53.5    1    0.00     5.0   103   108          108   +5
2    Magic Tattoo         5    53.5    2    0.20     0.0   105   118          118   +13
3    Golden Sickle        4    60.0    3    0.40     5.0   121   121          121   +0
4    Chocolate Soldier    3    55.5    4    0.70     4.5   115   113          113   -2
5    Exchange Student     4    54.0    5    1.20     5.0   106   109          109   +3
6    Elegant Ice          4    54.0    6    1.50     5.0   108   109          109   +1
7    Chasing Happiness    3    54.0    7    2.20     4.5   109   110          110   +1
8    Ice Star             2    56.0    8    4.50     3.0   112   117          117   +5
9    Time Fo Orchids      5    52.5    9    4.70     0.0   108   116          116   +8
10   Mover And Shaker     5    55.5    10   5.20     0.0   114   122          122   +8
11   Red Bomber           2    53.5    11   5.40     3.0   104   112          112   +8
12   Tchaikovsky          6    51.5    12   8.80     0.0   80    114          114   +34
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Dreamland 103 103 108 -5 5.0 -
2 Magic Tattoo 105 93 118 -25 0.0 -
3 Golden Sickle Line 121 121 121 ✓ Match 5.0
4 Chocolate Soldier 115 108 113 -5 4.5 -
5 Exchange Student 106 104 109 -5 5.0 -
6 Elegant Ice 108 108 109 -1 5.0 -
7 Chasing Happiness 109 110 110 ✓ Match 4.5 -
8 Ice Star 112 112 117 -5 3.0 -
9 Time Fo Orchids 108 109 116 -7 0.0 -
10 Mover And Shaker 114 109 122 -13 0.0 -
11 Red Bomber 104 86 112 -26 3.0 -
12 Tchaikovsky 80 81 114 -33 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