Official NHA Assessment

Race 2: 4RACING.TV MAIDEN PLATE (3-year-olds) (For Maiden 3 year-olds)

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Line Horse
Stroke Of Mercy
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
9 / 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    Tsar Bomba           3    60.0    1    0.00     9.5   -     -19          -     +0
2    Fly Isabella Fly     3    57.5    2    5.25     9.5   -     -24          -     +0
3    Stroke Of Mercy      5    60.0    3    7.00     0.0   -     -            -     +0
4    Just Proccie         2    60.0    4    8.20     6.5   66    -13          56    -10
5    Princess Ilaria      5    57.5    5    9.50     0.0   -     -5           -     +0
6    Harcourt             2    60.0    6    11.80    6.5   55    -13          45    -10
7    Woodland Ridge       2    60.0    7    12.10    6.5   -     -13          -     +0
8    Red Emperor          3    60.0    8    13.20    9.5   -     -19          -     +0
9    Kite Surfer          2    60.0    9    19.00    6.5   61    -13          51    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tsar Bomba - 91 - +91 9.5 -
2 Fly Isabella Fly - 74 - +74 9.5 -
3 Stroke Of Mercy Line - 52 - +52 0.0
4 Just Proccie 66 67 56 +11 6.5 -
5 Princess Ilaria - 79 - +79 0.0 -
6 Harcourt 55 52 45 +7 6.5 -
7 Woodland Ridge - 69 - +69 6.5 -
8 Red Emperor - 56 - +56 9.5 -
9 Kite Surfer 61 57 51 +6 6.5 -
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