Official NHA Assessment

Race 6: OK GRAND CHALLENGE (Grade 1) (Open/6th leg Open Series)

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Line Horse
Raffles
Reference for assessment
Exact Matches
3 / 15
Calculated = Official
Close Matches
4 / 15
Within 2 points
Significant Diffs
9 / 15
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    Buster Barnes        2    52.0    1    0.00     0.0   86    82           82    -4
2    Raffles              2    62.0    2    1.00     0.0   106   106          106   +0
3    Raining Again        6    52.0    3    1.50     0.0   84    85           85    +1
4    Ideal View           6    60.5    4    1.60     0.0   101   102          102   +1
5    Citrusdal            8    56.5    5    1.70     0.0   93    94           94    +1
6    Action Zone          3    54.0    6    1.80     2.0   88    85           85    -3
7    Tradition            4    52.0    7    1.90     1.0   84    83           83    -1
8    Wantage              8    56.0    8    2.00     0.0   92    93           93    +1
9    Jet Mirage           3    61.5    9    2.10     2.0   103   100          100   -3
10   Majestic Warrior     2    54.5    10   2.20     0.0   89    90           90    +1
11   Var Aglow            5    55.5    11   2.30     0.0   91    91           91    +0
12   Jaeger Moon          7    55.5    12   2.80     0.0   91    91           91    +0
13   Abayyaan             3    59.5    13   3.80     2.0   99    94           94    -5
14   Admirals Chance      5    53.5    14   4.80     0.0   87    85           85    -2
15   Holy Land            6    59.5    15   8.80     0.0   99    97           97    -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Buster Barnes 86 101 82 +19 0.0 -
2 Raffles Line 106 105 106 -1 0.0
3 Raining Again 84 73 85 -12 0.0 -
4 Ideal View 101 90 102 -12 0.0 -
5 Citrusdal 93 81 94 -13 0.0 -
6 Action Zone 88 90 85 +5 2.0 -
7 Tradition 84 77 83 -6 1.0 -
8 Wantage 92 78 93 -15 0.0 -
9 Jet Mirage 103 100 100 ✓ Match 2.0 -
10 Majestic Warrior 89 86 90 -4 0.0 -
11 Var Aglow 91 84 91 -7 0.0 -
12 Jaeger Moon 91 97 91 +6 0.0 -
13 Abayyaan 99 94 94 ✓ Match 2.0 -
14 Admirals Chance 87 77 85 -8 0.0 -
15 Holy Land 99 97 97 ✓ Match 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