Official NHA Assessment

Race 3: ROOIES FOURIE, GREG HOLME, DANNY LOMBARD MAIDEN PLATE (For all Maidens)

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Line Horse
Arizona Magic
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
3 / 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    Arizona Magic        4    60.0    1    0.00     3.5   66    66           66    +0
2    Periodic Table       3    60.0    2    2.75     3.0   -     67           67    +67
3    Sabalenka            2    54.5    3    6.75     2.0   -     58           58    +58
4    Sky Pilot            3    60.0    4    6.95     3.0   76    67           67    -9
5    Captain's Express    3    57.5    5    10.95    3.0   -     62           62    +62
6    Willow Charm         2    60.0    6    14.45    2.0   70    69           69    -1
7    Flotilla             2    57.0    7    17.35    2.0   -     63           63    +63
8    Stage One            2    57.0    8    21.75    2.0   -     63           63    +63
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arizona Magic Line 66 66 66 ✓ Match 3.5
2 Periodic Table - - 67 -67 3.0 -
3 Sabalenka - - 58 - 2.0 -
4 Sky Pilot 76 76 67 +9 3.0 -
5 Captain's Express - - 62 -62 3.0 -
6 Willow Charm 70 70 69 +1 2.0 -
7 Flotilla - - 63 - 2.0 -
8 Stage One - - 63 - 2.0 -
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