Official NHA Assessment

Race 6: GREYVILLE CONVENTION CENTRE C STAKES (For All Horses with a nett rating of 83 & below)

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Line Horse
Trippi T
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
2 / 12
Within 2 points
Significant Diffs
8 / 12
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    Princess Hannah      4    61.5    1    0.00     6.0   79    75           75    -4
2    Rhythm               2    60.0    2    0.50     3.5   73    77           77    +4
3    Rugger Lover         2    59.0    3    2.60     3.5   77    75           75    -2
4    Trippi T             3    61.5    4    2.90     5.0   77    77           77    +0
5    Fine One             2    61.5    5    3.10     3.5   84    80           80    -4
6    B Fiftytwo           4    61.5    6    4.60     6.0   78    75           75    -3
7    Chara Sands          3    58.5    7    5.00     5.0   74    71           71    -3
8    Ultra Quick          6    60.0    8    6.10     0.0   74    84           84    +10
9    Griffin Park         4    60.0    9    6.40     6.0   74    72           72    -2
10   Ndaka                3    57.5    10   6.90     5.0   73    69           69    -4
11   Trafalgar Square     6    56.0    11   7.60     0.0   71    76           76    +5
99   HereInAfter          4    52.0    99   0.00     6.0   -     56           56    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Princess Hannah 79 93 75 +18 6.0 -
2 Rhythm 73 67 77 -10 3.5 -
3 Rugger Lover 77 79 75 +4 3.5 -
4 Trippi T Line 77 75 77 -2 5.0
5 Fine One 84 84 80 +4 3.5 -
6 B Fiftytwo 78 68 75 -7 6.0 -
7 Chara Sands 74 70 71 -1 5.0 -
8 Ultra Quick 74 71 84 -13 0.0 -
9 Griffin Park 74 58 72 -14 6.0 -
10 Ndaka 73 61 69 -8 5.0 -
11 Trafalgar Square 71 69 76 -7 0.0 -
99 HereInAfter - 72 56 +16 6.0 -
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