Official NHA Assessment

Race 9: NEXT SUMMER FESTIVAL MEETING SUNDAY 10 DECEMBER CAPE C STAKES (For All Horses with a nett rating of 74 & below)

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Line Horse
Great Cat
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
5 / 11
Within 2 points
Significant Diffs
4 / 11
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    Wylie Jack           6    53.0    1    0.00     0.0   56    62           62    +6
2    On Board             3    57.0    2    1.75     6.0   71    58           61    -10
3    Great Cat            5    57.0    3    3.50     0.0   70    70           70    +0
4    Swift Action         3    60.0    4    3.80     6.0   71    64           64    -7
5    Final Move           3    54.0    5    4.00     6.0   57    52           52    -5
6    Rock On Tommy        3    51.0    6    4.10     6.0   50    46           46    -4
7    Wordsworth           7    54.0    7    5.35     0.0   59    64           64    +5
8    Warm Winter Nite     2    61.5    8    6.85     4.0   80    71           71    -9
9    Bonanza              3    55.5    9    6.90     6.0   61    55           55    -6
10   King Mo              2    60.0    10   8.90     4.0   70    68           68    -2
11   Bullitt              2    58.5    11   14.40    4.0   67    65           65    -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Wylie Jack 56 61 62 -1 0.0 -
2 On Board 71 66 61 +5 6.0 -
3 Great Cat Line 70 82 70 +12 0.0
4 Swift Action 71 77 64 +13 6.0 -
5 Final Move 57 50 52 -2 6.0 -
6 Rock On Tommy 50 50 46 +4 6.0 -
7 Wordsworth 59 65 64 +1 0.0 -
8 Warm Winter Nite 80 92 71 +21 4.0 -
9 Bonanza 61 57 55 +2 6.0 -
10 King Mo 70 53 68 -15 4.0 -
11 Bullitt 67 65 65 ✓ Match 4.0 -
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