Official NHA Assessment

Race 6: STEPHAN BALKIN PINNACLE STAKES (Open)

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Line Horse
ExpressFromTheUS
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 7
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    Golden Pheasant      7    60.0    1    0.00     0.0   108   104          104   -4
2    ExpressFromTheUS     5    58.0    2    0.50     0.0   105   105          105   +0
3    Green Haze           6    56.0    3    1.75     0.0   100   99           99    -1
4    Imperial Master      4    52.5    4    2.45     1.5   93    88           88    -5
5    Nartjie              4    54.0    5    2.50     1.5   85    91           91    +6
6    Paisley Park         4    56.0    6    3.40     1.5   98    94           94    -4
7    My Kingdom           6    54.5    7    15.00    0.0   50    93           93    +43
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Golden Pheasant 108 113 104 +9 0.0 -
2 ExpressFromTheUS Line 105 98 105 -7 0.0
3 Green Haze 100 98 99 -1 0.0 -
4 Imperial Master 93 90 88 +2 1.5 -
5 Nartjie 85 81 91 -10 1.5 -
6 Paisley Park 98 91 94 -3 1.5 -
7 My Kingdom 50 53 93 -40 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