Official NHA Assessment

Race 3: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MAIDEN PLATE (For all Maidens)

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Line Horse
Green Machine
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 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    Thoonsil             3    58.5    1    0.00     4.5   73    67           67    -6
2    Green Machine        3    60.0    2    1.75     4.5   75    75           75    +0
3    Comic Artist         2    54.0    3    9.00     0.0   76    67           67    -9
4    Greenside Girl       3    55.0    4    11.25    4.5   65    60           60    -5
5    Flying Predator      3    60.0    5    32.00    4.5   -     70           70    +70
6    Kings Head           4    60.0    6    37.50    2.0   -     75           75    +75
99   Heroic Act           3    60.0    99   0.00     4.5   -     70           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Thoonsil 73 77 67 +10 4.5 -
2 Green Machine Line 75 75 75 ✓ Match 4.5
3 Comic Artist 76 75 67 +8 0.0 -
4 Greenside Girl 65 62 60 +2 4.5 -
5 Flying Predator - 10 70 -60 4.5 -
6 Kings Head - - 75 -75 2.0 -
99 Heroic Act - 65 70 -5 4.5 -
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