Official NHA Assessment

Race 7: GREYVILLE CONVENTION CENTRE MR 75 HANDICAP (Open)

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Line Horse
Metallic Gold
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
1 / 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    Beechamwood Boy      6    57.5    1    0.00     0.0   70    85           70    +0
2    Justaguything        5    60.0    2    0.40     0.0   75    90           90    +15
3    Metallic Gold        3    60.0    3    1.00     7.5   75    75           75    +0
4    Son Of Zeus          3    60.0    4    1.75     7.5   75    75           75    +0
5    Stanley Park         2    57.5    5    3.15     5.0   80    75           75    -5
6    Flying Peter         4    59.5    6    3.20     9.0   74    71           71    -3
7    Purple Operator      3    57.0    7    4.80     7.5   69    69           69    +0
99   Gentleman's Way      6    59.0    99   0.00     0.0   -     88           88    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Beechamwood Boy 70 84 70 +14 0.0 -
2 Justaguything 75 87 90 -3 0.0 -
3 Metallic Gold Line 75 75 75 ✓ Match 7.5
4 Son Of Zeus 75 81 75 +6 7.5 -
5 Stanley Park 80 69 75 -6 5.0 -
6 Flying Peter 74 52 71 -19 9.0 -
7 Purple Operator 69 74 69 +5 7.5 -
99 Gentleman's Way - 73 88 -15 0.0 -
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