Official NHA Assessment

Race 6: WWW.TAB4RACING.COM MR 80 HANDICAP (Open)

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Line Horse
Pocket Watch
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
11 / 13
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    Slinky Mapimpi       5    60.5    1    0.00     0.0   81    90           81    +0
2    Rattle Bag           6    60.0    2    1.75     0.0   80    92           92    +12
3    Pocket Watch         2    57.0    3    3.50     0.0   84    84           84    +0
4    Forgiveness          4    57.5    4    3.60     2.5   85    80           80    -5
5    Willow Express       7    59.0    5    3.75     0.0   78    88           88    +10
6    His Master's Voice   2    58.0    6    7.25     0.0   76    85           85    +9
7    Arividicio           5    55.5    7    7.75     0.0   79    80           80    +1
8    Robert Burns         3    57.5    8    10.50    5.0   75    74           74    -1
9    Care Taker           4    59.5    9    11.00    2.5   89    83           83    -6
10   Super Agra           4    53.0    10   12.00    2.5   74    70           70    -4
11   Silent Trigger       6    50.5    11   12.75    0.0   69    70           70    +1
12   Secret Is Ours       4    60.5    12   20.75    2.5   81    85           85    +4
99   Presley              4    58.5    99   0.00     2.5   -     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 Slinky Mapimpi 81 101 81 +20 0.0 -
2 Rattle Bag 80 71 92 -21 0.0 -
3 Pocket Watch Line 84 83 84 -1 0.0
4 Forgiveness 85 94 80 +14 2.5 -
5 Willow Express 78 82 88 -6 0.0 -
6 His Master's Voice 76 69 85 -16 0.0 -
7 Arividicio 79 50 80 -30 0.0 -
8 Robert Burns 75 71 74 -3 5.0 -
9 Care Taker 89 76 83 -7 2.5 -
10 Super Agra 74 60 70 -10 2.5 -
11 Silent Trigger 69 60 70 -10 0.0 -
12 Secret Is Ours 81 66 85 -19 2.5 -
99 Presley - 90 81 +9 2.5 -
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