Official NHA Assessment

Race 10: PAMELA ISDELL CLASS 3 (Open. Benchmark at 60.0kg = 96)

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Line Horse
Tout A Fait
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
8 / 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    Gallic Dream         4    56.5    1    0.00     3.0   89    90           90    +1
2    Powerandtheglory     3    55.0    2    1.50     5.0   95    86           86    -9
3    Tout A Fait          3    56.0    3    2.25     5.0   88    88           88    +0
4    Big Unit             3    55.0    4    2.30     5.0   86    85           85    -1
5    Fibonacci            2    54.0    5    2.35     0.0   84    93           93    +9
6    Charlie Croker       2    56.0    6    4.10     0.0   88    96           96    +8
7    Hat's Pride          2    61.5    7    8.10     0.0   99    106          106   +7
8    Willie John          3    55.0    8    8.60     5.0   86    83           83    -3
9    Maphaka              2    54.0    9    8.80     0.0   94    91           91    -3
10   French Flame         2    56.0    10   10.55    0.0   98    95           95    -3
11   The Grey King        4    60.0    11   12.30    3.0   96    97           97    +1
12   Rosh Kedesh          5    56.5    12   12.60    0.0   88    96           96    +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gallic Dream 89 102 90 +12 3.0 -
2 Powerandtheglory 95 96 86 +10 5.0 -
3 Tout A Fait Line 88 80 88 -8 5.0
4 Big Unit 86 84 85 -1 5.0 -
5 Fibonacci 84 73 93 -20 0.0 -
6 Charlie Croker 88 82 96 -14 0.0 -
7 Hat's Pride 99 97 106 -9 0.0 -
8 Willie John 86 84 83 +1 5.0 -
9 Maphaka 94 87 91 -4 0.0 -
10 French Flame 98 82 95 -13 0.0 -
11 The Grey King 96 98 97 +1 3.0 -
12 Rosh Kedesh 88 88 96 -8 0.0 -
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