Official NHA Assessment

Race 3: TAB TELEBET 0861 000 822 MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Silver Slippers
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
3 / 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    Silver Slippers      3    60.0    1    0.00     2.0   62    62           62    +0
2    Gift Of Giving       3    60.0    2    0.25     2.0   61    62           62    +1
3    Magic Moments        3    60.0    3    7.25     2.0   68    62           62    -6
4    Twice The Secret     3    60.0    4    10.50    2.0   55    62           62    +7
5    Such Luck            3    60.0    5    11.50    2.0   55    62           62    +7
6    A Foreign Affair     3    60.0    6    12.50    2.0   50    62           62    +12
7    Rebecca Grace        3    60.0    7    35.00    2.0   -     62           62    +62
99   Mi Mi Apple Pie      3    60.0    99   0.00     2.0   -     62           62    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Silver Slippers Line 62 63 62 +1 2.0
2 Gift Of Giving 61 61 62 -1 2.0 -
3 Magic Moments 68 47 62 -15 2.0 -
4 Twice The Secret 55 60 62 -2 2.0 -
5 Such Luck 55 52 62 -10 2.0 -
6 A Foreign Affair 50 49 62 -13 2.0 -
7 Rebecca Grace - 32 62 -30 2.0 -
99 Mi Mi Apple Pie - 56 62 -6 2.0 -
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