Official NHA Assessment

Race 3: PLAY SOCCER 6, 10 AND 13 MAIDEN PLATE (For all Maidens)

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Line Horse
Gunboat
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
3 / 9
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    Hat's Mambo          3    60.0    1    0.00     3.0   -     74           6     +6
2    Purple Rain          3    57.5    2    1.30     3.0   -     69           69    +69
3    Gunboat              3    60.0    3    4.00     3.0   74    74           74    +0
99   Arizona Magic        4    60.0    99   0.00     3.5   -     73           73    +0
99   Onceinabluemoon      2    57.5    99   0.00     2.0   -     71           71    +0
99   Noble Chiefdom       2    57.0    99   0.00     2.0   -     70           70    +0
99   Sherlock Holmes      2    57.0    99   0.00     2.0   -     70           70    +0
99   Lookout Mountain     3    57.5    99   0.00     3.0   -     69           69    +0
99   Lance Attack         2    57.0    99   0.00     2.0   -     70           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Hat's Mambo - - 6 -6 3.0 -
2 Purple Rain - - 69 -69 3.0 -
3 Gunboat Line 74 74 74 ✓ Match 3.0
99 Arizona Magic - 66 73 -7 3.5 -
99 Onceinabluemoon - 75 71 +4 2.0 -
99 Noble Chiefdom - - 70 - 2.0 -
99 Sherlock Holmes - - 70 - 2.0 -
99 Lookout Mountain - 69 69 ✓ Match 3.0 -
99 Lance Attack - - 70 - 2.0 -
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