Official NHA Assessment

Race 3: EVOLUTION CLASS 4 (Open. Benchmark at 60.0kg = 82)

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Line Horse
Winter Pearl
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
7 / 12
Within 2 points
Significant Diffs
4 / 12
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    Mauritius Kestrel    3    58.5    1    0.00     6.0   79    75           75    -4
2    Azzurri              4    57.5    2    0.50     7.0   77    71           71    -6
3    Winter Pearl         6    49.5    3    1.00     0.0   69    69           69    +0
4    Spirit               2    60.0    4    1.50     4.0   90    82           82    -8
5    Steadfast            2    57.0    5    1.90     4.0   76    76           76    +0
6    Green Planet         3    52.0    6    2.65     6.0   66    62           62    -4
7    Churchillian         2    63.5    7    2.95     4.0   97    89           89    -8
8    Parental Guidance    2    61.0    8    6.20     4.0   92    84           84    -8
9    Dawn's Early Light   3    55.5    9    7.20     6.0   72    69           69    -3
10   Surge Of Power       2    60.0    10   7.95     4.0   82    82           82    +0
11   Nightrain            2    60.0    11   8.35     4.0   90    82           82    -8
12   Navaseven            3    56.0    12   8.85     6.0   85    70           75    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mauritius Kestrel 79 82 75 +7 6.0 -
2 Azzurri 77 77 71 +6 7.0 -
3 Winter Pearl Line 69 71 69 +2 0.0
4 Spirit 90 91 82 +9 4.0 -
5 Steadfast 76 75 76 -1 4.0 -
6 Green Planet 66 61 62 -1 6.0 -
7 Churchillian 97 95 89 +6 4.0 -
8 Parental Guidance 92 82 84 -2 4.0 -
9 Dawn's Early Light 72 72 69 +3 6.0 -
10 Surge Of Power 82 80 82 -2 4.0 -
11 Nightrain 90 83 82 +1 4.0 -
12 Navaseven 85 77 75 +2 6.0 -
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