Official NHA Assessment

Race 4: SLOWGRADE ENGINEERING MERIT RATED 90 HANDICAP (Open)

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Line Horse
Citrusdal
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
0 / 5
Within 2 points
Significant Diffs
5 / 5
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    Zazu                 6    55.0    1    0.00     0.0   80    77           80    +0
2    Admirals Chance      5    57.0    2    1.25     0.0   84    85           85    +1
3    Citrusdal            8    61.0    3    2.00     0.0   92    92           92    +0
4    Power Ranger         7    57.5    4    2.05     0.0   85    85           85    +0
99   Aerial Display       5    53.5    99   0.00     0.0   -     74           74    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zazu 80 71 80 -9 0.0 -
2 Admirals Chance 84 77 85 -8 0.0 -
3 Citrusdal Line 92 81 92 -11 0.0
4 Power Ranger 85 69 85 -16 0.0 -
99 Aerial Display - 68 74 -6 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