Official NHA Assessment

Race 7: BOOK FOR CHAMPIONS DAY 29 MARCH MR 80 HANDICAP (Open)

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Line Horse
Arilena
Reference for assessment
Exact Matches
2 / 17
Calculated = Official
Close Matches
3 / 17
Within 2 points
Significant Diffs
7 / 17
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    Var Park             5    60.5    1    0.00     0.0   81    81           81    +0
2    Tchaikovsky          6    60.5    2    0.75     0.0   81    81           81    +0
3    Arilena              6    57.5    3    1.25     0.0   75    75           75    +0
4    Nkandla Gold         4    59.5    4    1.35     4.0   79    71           71    -8
5    Tiger Storm          3    59.0    5    1.45     3.5   83    71           73    -10
6    Kinshin Sha          4    60.0    6    1.55     4.0   80    72           72    -8
7    Beamonesque          4    58.0    7    2.65     4.0   76    68           68    -8
8    Sea Wolf             3    60.0    8    2.90     3.5   85    73           75    -10
9    King Of Kildare      3    60.5    9    4.20     3.5   86    74           76    -10
10   Thunderbird          4    54.5    10   5.00     4.0   69    61           61    -8
11   Wings Of Nike        6    56.5    11   7.00     0.0   73    73           73    +0
12   Covert Operator      6    59.5    12   11.25    0.0   79    79           79    +0
13   Bregardt             4    52.0    13   21.50    4.0   59    56           56    -3
99   Lonely As A Cloud    3    56.5    99   0.00     3.5   -     66           66    +0
99   The Navy Lark        4    58.5    99   0.00     4.0   -     69           69    +0
99   Qhawe Lami           4    62.0    99   0.00     4.0   -     76           76    +0
99   Thymetoshine         5    52.0    99   0.00     0.0   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Var Park 81 87 81 +6 0.0 -
2 Tchaikovsky 81 81 81 ✓ Match 0.0 -
3 Arilena Line 75 75 75 ✓ Match 0.0
4 Nkandla Gold 79 63 71 -8 4.0 -
5 Tiger Storm 83 69 73 -4 3.5 -
6 Kinshin Sha 80 62 72 -10 4.0 -
7 Beamonesque 76 76 68 +8 4.0 -
8 Sea Wolf 85 87 75 +12 3.5 -
9 King Of Kildare 86 81 76 +5 3.5 -
10 Thunderbird 69 70 61 +9 4.0 -
11 Wings Of Nike 73 68 73 -5 0.0 -
12 Covert Operator 79 77 79 -2 0.0 -
13 Bregardt 59 52 56 -4 4.0 -
99 Lonely As A Cloud - 71 66 +5 3.5 -
99 The Navy Lark - 74 69 +5 4.0 -
99 Qhawe Lami - 80 76 +4 4.0 -
99 Thymetoshine - 51 64 -13 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