Official NHA Assessment

Race 6: PLAY SOCCER 6, 10 AND 13 DERBY PLATE (For 3 year olds)

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Line Horse
Silvan Mistress
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 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    Silvan Mistress      2    56.5    1    0.00     0.0   91    91           91    +0
2    World Choice         2    56.0    2    0.75     0.0   74    96           96    +22
3    Action America       2    56.0    3    3.25     0.0   80    93           93    +13
4    Wild Fig             2    56.0    4    4.00     0.0   82    92           92    +10
5    Above The Horizon    2    60.0    5    5.25     0.0   86    98           98    +12
6    Drielandenpunt       3    56.0    6    5.75     3.5   74    83           83    +9
7    Supreme Judge        2    58.0    7    8.00     0.0   78    94           94    +16
8    Rock Of Futura       2    56.5    8    43.25    0.0   72    91           91    +19
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Silvan Mistress Line 91 91 91 ✓ Match 0.0
2 World Choice 74 74 96 -22 0.0 -
3 Action America 80 80 93 -13 0.0 -
4 Wild Fig 82 82 92 -10 0.0 -
5 Above The Horizon 86 86 98 -12 0.0 -
6 Drielandenpunt 74 74 83 -9 3.5 -
7 Supreme Judge 78 77 94 -17 0.0 -
8 Rock Of Futura 72 72 91 -19 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