Official NHA Assessment

Race 5: GREYVILLE CONVENTION CENTRE MR 73 HANDICAP (Open)

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Line Horse
Porfirio
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
4 / 9
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    Zoombomber           2    53.5    1    0.00     0.0   61    58           61    +0
2    Bom Bom              4    57.5    2    0.75     5.0   72    60           62    -10
3    Landseer             4    61.0    3    0.95     5.0   76    67           67    -9
4    Porfirio             6    55.5    4    2.85     0.0   64    64           64    +0
5    Khanyisa Indlela     3    61.0    5    3.75     8.0   75    58           65    -10
6    Captain Marsala      2    57.5    6    6.65     0.0   77    66           67    -10
7    Famous And Rich      2    59.0    7    8.85     0.0   71    69           69    -2
8    Tom's Act            3    56.0    8    9.95     8.0   65    47           55    -10
9    Daring Act           4    53.5    9    10.25    5.0   61    48           51    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zoombomber 61 60 61 -1 0.0 -
2 Bom Bom 72 64 62 +2 5.0 -
3 Landseer 76 67 67 ✓ Match 5.0 -
4 Porfirio Line 64 88 64 +24 0.0
5 Khanyisa Indlela 75 74 65 +9 8.0 -
6 Captain Marsala 77 68 67 +1 0.0 -
7 Famous And Rich 71 66 69 -3 0.0 -
8 Tom's Act 65 64 55 +9 8.0 -
9 Daring Act 61 60 51 +9 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