Official NHA Assessment

Race 2: WWW.TAB4RACING.COM MAIDEN PLATE (A) (For all Maidens)

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Line Horse
Bob
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
12 / 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    Green Flash          4    57.5    1    0.00     6.0   -     74           6     +6
2    Bob                  3    60.0    2    2.00     5.0   81    81           81    +0
3    Phala Millions       4    60.0    3    6.00     6.0   64    79           79    +15
4    Sea Shanty           4    56.0    4    7.50     6.0   74    71           71    -3
5    Empressofnormandy    3    57.5    5    9.00     5.0   73    76           76    +3
6    Trip To States       5    56.0    6    9.50     0.0   65    83           83    +18
7    Galladorn            2    60.0    7    10.00    3.5   67    84           84    +17
8    Monte Bello          3    60.0    8    11.25    5.0   -     81           81    +81
9    Prized Platinum      3    60.0    9    11.75    5.0   -     81           81    +81
10   Isiqalaba            3    60.0    10   12.75    5.0   -     81           81    +81
11   Japanese Star        3    60.0    11   13.25    5.0   70    81           81    +11
12   Douglas Dragon       3    58.5    12   16.75    5.0   -     78           78    +78
13   Duke Of Argyll       3    60.0    13   99.99    5.0   -     81           81    +81
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Green Flash - 91 6 +85 6.0 -
2 Bob Line 81 52 81 -29 5.0
3 Phala Millions 64 66 79 -13 6.0 -
4 Sea Shanty 74 71 71 ✓ Match 6.0 -
5 Empressofnormandy 73 61 76 -15 5.0 -
6 Trip To States 65 63 83 -20 0.0 -
7 Galladorn 67 75 84 -9 3.5 -
8 Monte Bello - 65 81 -16 5.0 -
9 Prized Platinum - 72 81 -9 5.0 -
10 Isiqalaba - 55 81 -26 5.0 -
11 Japanese Star 70 68 81 -13 5.0 -
12 Douglas Dragon - 89 78 +11 5.0 -
13 Duke Of Argyll - 10 81 -71 5.0 -
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