Official NHA Assessment

Race 3: TAB 4RACING APP MAIDEN PLATE (For all Maidens)

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Line Horse
Bandmaster
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 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    Diamond Jim          3    58.0    1    0.00     9.5   -     59           6     +6
2    Bandmaster           3    60.0    2    4.25     9.5   63    63           63    +0
3    Like A Butterfly     3    57.5    3    7.75     9.5   59    58           58    -1
4    River Fern           2    58.0    4    9.25     6.5   75    65           65    -10
5    Khichdi              3    60.0    5    16.50    9.5   75    63           65    -10
6    Star Trooper         3    60.0    6    17.00    9.5   57    63           63    +6
7    Playmaker            3    58.0    7    18.25    9.5   -     59           59    +59
99   Captain Clever       2    60.0    99   0.00     6.5   -     69           69    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Diamond Jim - 76 6 +70 9.5 -
2 Bandmaster Line 63 62 63 -1 9.5
3 Like A Butterfly 59 54 58 -4 9.5 -
4 River Fern 75 73 65 +8 6.5 -
5 Khichdi 75 62 65 -3 9.5 -
6 Star Trooper 57 51 63 -12 9.5 -
7 Playmaker - 68 59 +9 9.5 -
99 Captain Clever - 63 69 -6 6.5 -
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