Official NHA Assessment

Race 5: GOLD CIRCLE RACING YOUTUBE CHANNEL MR 73 HANDICAP (Open)

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Line Horse
Preemptive Strike
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
6 / 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    Son Of Silk          4    56.5    1    0.00     2.5   65    65           65    +0
2    Cavalieri            5    58.5    2    0.50     0.0   70    79           79    +9
3    Preemptive Strike    4    55.5    3    0.80     2.5   67    67           67    +0
4    Parmenion            5    56.0    4    1.90     0.0   74    72           72    -2
5    Blackwhitedynamite   3    59.0    5    1.95     4.0   76    70           70    -6
6    Rugger Bugger        3    59.0    6    2.10     4.0   80    70           70    -10
7    Son Of Zeus          3    59.5    7    3.50     4.0   72    69           69    -3
8    Roy's July Magic     4    56.5    8    4.30     2.5   66    65           65    -1
9    Sir Theodore         3    52.0    9    4.90     4.0   57    53           53    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Son Of Silk 65 65 65 ✓ Match 2.5 -
2 Cavalieri 70 73 79 -6 0.0 -
3 Preemptive Strike Line 67 70 67 +3 2.5
4 Parmenion 74 78 72 +6 0.0 -
5 Blackwhitedynamite 76 86 70 +16 4.0 -
6 Rugger Bugger 80 77 70 +7 4.0 -
7 Son Of Zeus 72 81 69 +12 4.0 -
8 Roy's July Magic 66 48 65 -17 2.5 -
9 Sir Theodore 57 53 53 ✓ Match 4.0 -
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