Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY RACING MAIDEN PLATE (For all Maidens)

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Line Horse
Seismic Event
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
2 / 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    Seismic Event        2    60.0    1    0.00     4.0   70    70           70    +0
2    Joyous Jubilee (AUS  2    60.0    2    1.25     4.0   -     70           70    +70
3    Goom Goom            3    60.0    3    1.30     6.0   58    66           66    +8
4    Siberian Fox         2    60.0    4    2.55     4.0   63    70           70    +7
5    Glitterfox           2    57.5    5    3.80     4.0   56    65           65    +9
6    Connection           3    60.0    6    5.55     6.0   62    66           66    +4
99   Gangster Boss        3    60.0    99   0.00     6.0   -     66           66    +0
99   Peronzada            3    57.5    99   0.00     6.0   -     61           61    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Seismic Event Line 70 70 70 ✓ Match 4.0
2 Joyous Jubilee (AUS) - 61 70 -9 4.0 -
3 Goom Goom 58 59 66 -7 6.0 -
4 Siberian Fox 63 62 70 -8 4.0 -
5 Glitterfox 56 57 65 -8 4.0 -
6 Connection 62 67 66 +1 6.0 -
99 Gangster Boss - 55 66 -11 6.0 -
99 Peronzada - 56 61 -5 6.0 -
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