Official NHA Assessment

Race 3: FOLLOW IN THE BOX SEAT PODCAST MR 86 HANDICAP (Open)

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Line Horse
Sunday Island (AUS)
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
6 / 8
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    Monarchy             5    57.5    1    0.00     0.0   81    97           81    +0
2    Arumugam             6    57.0    2    0.05     0.0   82    96           96    +14
3    Sunday Island (AUS)  3    60.5    3    0.35     9.5   89    89           89    +0
4    Juan Carlos          7    56.0    4    0.55     0.0   81    99           99    +18
5    Artic Tune           4    58.5    5    16.85    6.0   83    87           87    +4
6    Have A Go Jo         4    53.5    6    17.25    6.0   78    77           77    -1
7    Iron Will            4    58.5    7    18.45    6.0   85    87           87    +2
99   Sea Master           4    59.5    99   0.00     6.0   -     89           89    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Monarchy 81 77 81 -4 0.0 -
2 Arumugam 82 74 96 -22 0.0 -
3 Sunday Island (AUS) Line 89 86 89 -3 9.5
4 Juan Carlos 81 93 99 -6 0.0 -
5 Artic Tune 83 81 87 -6 6.0 -
6 Have A Go Jo 78 70 77 -7 6.0 -
7 Iron Will 85 63 87 -24 6.0 -
99 Sea Master - 99 89 +10 6.0 -
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