Official NHA Assessment

Race 4: TAB 4RACING APP GUINEAS PLATE (3 year olds)

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Line Horse
Fairy Knight
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
9 / 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    Fairy Knight         4    60.0    1    0.00     3.0   93    93           93    +0
2    Abound               4    54.0    2    2.00     3.0   77    84           84    +7
3    Waz Wouter           4    58.0    3    4.25     3.0   72    90           90    +18
4    Legal Thriller       4    58.0    4    9.75     3.0   79    89           89    +10
5    Back For More        4    55.0    5    10.00    3.0   82    83           83    +1
6    Empire Blue          4    60.0    6    10.10    3.0   85    93           93    +8
7    Idita                4    55.0    7    10.35    3.0   90    83           83    -7
8    Bob Lee Swagger      4    58.0    8    19.10    3.0   70    89           89    +19
9    Lord Milori          2    58.0    9    20.35    0.0   81    95           95    +14
10   Global Banker        4    58.0    10   22.60    3.0   74    89           89    +15
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Fairy Knight Line 93 118 93 +25 3.0
2 Abound 77 77 84 -7 3.0 -
3 Waz Wouter 72 84 90 -6 3.0 -
4 Legal Thriller 79 70 89 -19 3.0 -
5 Back For More 82 75 83 -8 3.0 -
6 Empire Blue 85 71 93 -22 3.0 -
7 Idita 90 79 83 -4 3.0 -
8 Bob Lee Swagger 70 53 89 -36 3.0 -
9 Lord Milori 81 64 95 -31 0.0 -
10 Global Banker 74 55 89 -34 3.0 -
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