Official NHA Assessment

Race 8: TAB TELEBET 0861 000 822 DERBY PLATE (3 year olds)

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Line Horse
Gideon's Daughter
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
11 / 11
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    Woman's World        4    54.5    1    0.00     1.5   75    78           78    +3
2    Gideon's Daughter    4    56.5    2    0.25     1.5   82    82           82    +0
3    Slainte Mhath        4    58.0    3    0.75     1.5   64    91           91    +27
4    Give Us A Smile      2    58.0    4    2.00     0.0   67    93           93    +26
5    Waz Wouter           4    60.0    5    3.00     1.5   87    92           92    +5
6    Mo Flow              3    58.0    6    6.00     3.5   71    81           81    +10
7    Bridgerton           2    58.0    7    14.25    0.0   69    88           88    +19
8    Bob Lee Swagger      4    58.0    8    20.75    1.5   69    85           85    +16
9    King Of Seville      2    56.5    9    32.25    0.0   77    85           85    +8
10   Pisces               2    58.0    10   99.97    0.0   63    88           88    +25
99   Silver Hunt          2    54.5    99   0.00     0.0   -     81           81    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Woman's World 75 94 78 +16 1.5 -
2 Gideon's Daughter Line 82 94 82 +12 1.5
3 Slainte Mhath 64 81 91 -10 1.5 -
4 Give Us A Smile 67 67 93 -26 0.0 -
5 Waz Wouter 87 84 92 -8 1.5 -
6 Mo Flow 71 66 81 -15 3.5 -
7 Bridgerton 69 67 88 -21 0.0 -
8 Bob Lee Swagger 69 53 85 -32 1.5 -
9 King Of Seville 77 65 85 -20 0.0 -
10 Pisces 63 56 88 -32 0.0 -
99 Silver Hunt - 71 81 -10 0.0 -
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