Official NHA Assessment

Race 3: RACEHORSE OWNERS ASSOCIATION FM 72 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
On The Guest List
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
4 / 9
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    Trip To Barberton    2    54.0    1    0.00     0.0   60    54           60    +0
2    Lady Writer          3    56.0    2    0.50     4.5   64    56           56    -8
3    On The Guest List    2    55.0    3    1.75     0.0   61    61           61    +0
4    Sky Velocity         5    53.5    4    3.25     0.0   59    56           56    -3
5    Izhiestia            5    52.0    5    3.50     0.0   54    53           53    -1
6    St Cloud             3    61.0    6    5.25     4.5   74    59           64    -10
7    Josi Mo              2    56.5    7    7.50     0.0   74    59           64    -10
8    Heartsease           3    61.0    8    7.75     4.5   74    59           64    -10
9    Sunlit From Heaven   3    53.5    9    9.00     4.5   59    44           49    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Trip To Barberton 60 64 60 +4 0.0 -
2 Lady Writer 64 69 56 +13 4.5 -
3 On The Guest List Line 61 57 61 -4 0.0
4 Sky Velocity 59 57 56 +1 0.0 -
5 Izhiestia 54 52 53 -1 0.0 -
6 St Cloud 74 73 64 +9 4.5 -
7 Josi Mo 74 56 64 -8 0.0 -
8 Heartsease 74 73 64 +9 4.5 -
9 Sunlit From Heaven 59 54 49 +5 4.5 -
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