Official NHA Assessment

Race 7: CHAMPION OLDER HORSE: WILLIAM ROBERTSON MR 96 HANDICAP (Open)

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Line Horse
Hawkbill
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
2 / 12
Within 2 points
Significant Diffs
7 / 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    Count Huhtikuu       3    52.5    1    0.00     2.0   85    77           85    +0
2    Hawkbill             4    58.0    2    2.70     1.0   92    92           92    +0
3    Beynac               2    53.0    3    3.20     0.0   86    84           84    -2
4    Jordan               4    55.5    4    4.60     1.0   87    85           85    -2
5    Bacchus              3    60.0    5    4.90     2.0   100   92           92    -8
6    Total Surrender      5    54.5    6    7.60     0.0   85    85           85    +0
7    Dj Junior            3    54.5    7    8.40     2.0   85    81           81    -4
8    Taxhaven             4    53.5    8    8.90     1.0   83    81           81    -2
9    Apache Son           4    58.5    9    11.40    1.0   93    91           91    -2
10   Battleground         5    60.0    10   11.70    0.0   96    96           96    +0
11   Street Art           3    60.0    11   11.95    2.0   96    92           92    -4
12   Quatermain           2    49.5    12   15.25    0.0   79    75           75    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Count Huhtikuu 85 101 85 +16 2.0 -
2 Hawkbill Line 92 100 92 +8 1.0
3 Beynac 86 90 84 +6 0.0 -
4 Jordan 87 88 85 +3 1.0 -
5 Bacchus 100 101 92 +9 2.0 -
6 Total Surrender 85 74 85 -11 0.0 -
7 Dj Junior 85 79 81 -2 2.0 -
8 Taxhaven 83 96 81 +15 1.0 -
9 Apache Son 93 89 91 -2 1.0 -
10 Battleground 96 92 96 -4 0.0 -
11 Street Art 96 78 92 -14 2.0 -
12 Quatermain 79 79 75 +4 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