Official NHA Assessment

Race 8: WOODRUFF RACING SYNDICATE CLASS 4 (Open. Benchmark at 60.0kg = 82)

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Line Horse
Rattlesnake
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
3 / 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    Dame Of Trix         4    55.0    1    0.00     10.0  75    69           69    -6
2    Demanding Dave       2    57.0    2    0.05     5.5   87    82           82    -5
3    Rattlesnake          3    59.5    3    4.05     8.5   81    81           81    +0
4    Kaalvoet             2    63.0    4    4.45     5.5   99    94           94    -5
5    Worldly              2    53.0    5    4.85     5.5   76    74           74    -2
6    Marketa              2    50.5    6    5.25     5.5   82    69           72    -10
7    Mauritius Kestrel    3    58.5    7    5.55     8.5   87    79           79    -8
8    Heritage Ridge       3    54.0    8    6.05     8.5   70    70           70    +0
9    Victor Hugo          3    59.0    9    6.80     8.5   80    80           80    +0
10   Amen Corner          2    56.0    10   8.80     5.5   85    80           80    -5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Dame Of Trix 75 90 69 +21 10.0 -
2 Demanding Dave 87 102 82 +20 5.5 -
3 Rattlesnake Line 81 85 81 +4 8.5
4 Kaalvoet 99 93 94 -1 5.5 -
5 Worldly 76 78 74 +4 5.5 -
6 Marketa 82 76 72 +4 5.5 -
7 Mauritius Kestrel 87 82 79 +3 8.5 -
8 Heritage Ridge 70 59 70 -11 8.5 -
9 Victor Hugo 80 79 80 -1 8.5 -
10 Amen Corner 85 76 80 -4 5.5 -
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