Official NHA Assessment

Race 8: WOODHILL RACING SYNDICATE D STAKES (For All Horses with a nett rating of 69 & below)

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Line Horse
Rosa Osiria
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
4 / 10
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    Over The Atlantic    3    48.0    1    0.00     2.0   54    45           45    -9
2    Rosa Osiria          3    58.0    2    0.50     2.0   65    65           65    +0
3    Black Path           6    53.0    3    0.55     0.0   51    59           59    +8
4    Golden Ideal         3    52.0    4    2.30     2.0   56    53           53    -3
5    Winteronthegreen     3    56.5    5    3.80     2.0   62    62           62    +0
6    Electric Feels       5    56.5    6    5.05     0.0   58    66           66    +8
6    Try Me               4    54.5    6    5.05     2.5   53    57           57    +4
8    Country Time         5    55.0    8    5.80     0.0   53    63           63    +10
9    Bitter Sweet         3    53.5    9    15.30    2.0   55    56           56    +1
99   Champagne Mac        4    59.0    99   0.00     2.5   -     66           66    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Over The Atlantic 54 56 45 +11 2.0 -
2 Rosa Osiria Line 65 57 65 -8 2.0
3 Black Path 51 58 59 -1 0.0 -
4 Golden Ideal 56 56 53 +3 2.0 -
5 Winteronthegreen 62 61 62 -1 2.0 -
6 Electric Feels 58 57 66 -9 0.0 -
6 Try Me 53 52 57 -5 2.5 -
8 Country Time 53 62 63 -1 0.0 -
9 Bitter Sweet 55 53 56 -3 2.0 -
99 Champagne Mac - 55 66 -11 2.5 -
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