Official NHA Assessment

Race 5: GREYVENSTEINS MR 67 HANDICAP (Open)

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Line Horse
Global Ash
Reference for assessment
Exact Matches
3 / 10
Calculated = Official
Close Matches
5 / 10
Within 2 points
Significant Diffs
3 / 10
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    Cool Runnings        4    55.5    1    0.00     9.0   58    58           58    +0
2    Verified             3    58.0    2    1.00     7.5   63    66           66    +3
3    Global Ash           4    57.0    3    1.75     9.0   61    61           61    +0
4    Silver Stardust      4    58.5    4    1.85     9.0   64    64           64    +0
5    Sanctity             4    57.0    5    3.35     9.0   64    61           61    -3
6    Glass Shoes          3    60.0    6    3.85     7.5   77    70           70    -7
7    Bethel               6    59.5    7    4.35     0.0   66    84           84    +18
8    Great Melody         3    57.0    8    5.60     7.5   61    64           64    +3
9    Psychedelic Eric     3    58.5    9    7.10     7.5   64    67           67    +3
10   Knave Of Diamonds    3    56.0    10   9.35     7.5   59    62           62    +3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cool Runnings 58 60 58 +2 9.0 -
2 Verified 63 65 66 -1 7.5 -
3 Global Ash Line 61 61 61 ✓ Match 9.0
4 Silver Stardust 64 64 64 ✓ Match 9.0 -
5 Sanctity 64 61 61 ✓ Match 9.0 -
6 Glass Shoes 77 75 70 +5 7.5 -
7 Bethel 66 76 84 -8 0.0 -
8 Great Melody 61 79 64 +15 7.5 -
9 Psychedelic Eric 64 50 67 -17 7.5 -
10 Knave Of Diamonds 59 57 62 -5 7.5 -
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