Official NHA Assessment

Race 7: TAB 4RACING APP MR 66 HANDICAP (Open)

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Line Horse
Jet Set Run
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 10
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    Ravilious            3    59.0    1    0.00     9.5   64    71           64    +0
2    Maneki Neko          2    59.0    2    0.10     6.5   64    77           77    +13
3    Jet Set Run          2    56.5    3    0.35     6.5   72    72           72    +0
4    War Launch           2    52.0    4    0.60     6.5   50    63           63    +13
5    Happy Wives          3    62.0    5    0.70     9.5   70    77           77    +7
6    City Of Dreams       3    57.0    6    1.20     9.5   60    67           67    +7
7    Opera Verse          4    50.5    7    2.45     11.0  55    51           51    -4
8    Casino Ace           5    55.0    8    2.95     0.0   61    82           82    +21
9    House Of Sussex      4    55.0    9    3.70     11.0  56    60           60    +4
10   Party Girl           3    58.0    10   5.95     9.5   75    69           69    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ravilious 64 81 64 +17 9.5 -
2 Maneki Neko 64 60 77 -17 6.5 -
3 Jet Set Run Line 72 80 72 +8 6.5
4 War Launch 50 50 63 -13 6.5 -
5 Happy Wives 70 80 77 +3 9.5 -
6 City Of Dreams 60 59 67 -8 9.5 -
7 Opera Verse 55 50 51 -1 11.0 -
8 Casino Ace 61 56 82 -26 0.0 -
9 House Of Sussex 56 50 60 -10 11.0 -
10 Party Girl 75 73 69 +4 9.5 -
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