Official NHA Assessment

Race 7: TAB 4RACING APP NOVICE HANDICAP (Maidens & 1 time winners)

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Line Horse
South Boy (ARG)
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
4 / 7
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    Lulu's Boy           5    52.0    1    0.00     0.0   63    92           63    +0
2    Irrevocable Dream    5    52.0    2    0.50     0.0   59    92           92    +33
3    South Boy (ARG)      4    55.0    3    2.25     12.0  74    74           74    +0
4    Fast Love            4    60.5    4    4.25     12.0  85    85           85    +0
5    Jinqin               2    53.0    5    4.50     7.0   84    80           80    -4
6    Moonstrike           3    52.5    6    5.00     10.5  69    72           72    +3
99   Java House           4    50.5    99   0.00     12.0  -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Lulu's Boy 63 71 63 +8 0.0 -
2 Irrevocable Dream 59 62 92 -30 0.0 -
3 South Boy (ARG) Line 74 71 74 -3 12.0
4 Fast Love 85 90 85 +5 12.0 -
5 Jinqin 84 84 80 +4 7.0 -
6 Moonstrike 69 50 72 -22 10.5 -
99 Java House - 52 65 -13 12.0 -
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