Official NHA Assessment

Race 3: DAVE BULLOCK, DOUGLAS ROPER, SIMON RAHILLY, LAWRENCE RILEY MR 77 HANDICAP (Open)

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Line Horse
Afraad
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
5 / 7
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    Positive Attitude    6    56.5    1    0.00     0.0   72    68           72    +0
2    Monsieur Chevelle    3    53.5    2    1.75     5.5   69    55           59    -10
3    Afraad               8    60.0    3    3.75     0.0   77    77           77    +0
4    Go Dream Machine     3    50.5    4    4.85     5.5   53    45           45    -8
5    Great Affair         7    58.5    5    5.00     0.0   74    72           72    -2
99   Pretty In Pearls     3    52.0    99   0.00     5.5   -     48           48    +0
99   Zuzan                3    60.0    99   0.00     5.5   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Positive Attitude 72 90 72 +18 0.0 -
2 Monsieur Chevelle 69 63 59 +4 5.5 -
3 Afraad Line 77 79 77 +2 0.0
4 Go Dream Machine 53 52 45 +7 5.5 -
5 Great Affair 74 63 72 -9 0.0 -
99 Pretty In Pearls - 56 48 +8 5.5 -
99 Zuzan - 98 64 +34 5.5 -
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