Official NHA Assessment

Race 6: GUINEAS TRIAL (3 year olds)

Back to Race
Line Horse
Down To Business
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
0 / 5
Within 2 points
Significant Diffs
4 / 5
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    Jacky Sparrow        3    54.5    1    0.00     5.0   65    62           62    -3
2    Down To Business     2    60.0    2    2.00     0.0   86    86           86    +0
3    Testify              2    56.5    3    4.50     0.0   67    76           76    +9
4    Red Top              5    57.5    4    16.50    0.0   65    78           78    +13
5    Etsa Moralo          3    57.5    5    16.60    5.0   -     68           68    +68
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Jacky Sparrow 65 80 62 +18 5.0 -
2 Down To Business Line 86 100 86 +14 0.0
3 Testify 67 71 76 -5 0.0 -
4 Red Top 65 70 78 -8 0.0 -
5 Etsa Moralo - 36 68 -32 5.0 -
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