Official NHA Assessment

Race 2: DRAKENSTEIN STUD MAIDEN PLATE (For all Maidens)

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Line Horse
Red Wave
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
8 / 11
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    Loving Prague (AUS)  3    60.0    1    0.00     6.0   -     77           6     +6
2    Red Wave             2    60.0    2    3.00     4.0   81    81           81    +0
3    I Am Sam             3    60.0    3    3.75     6.0   -     77           77    +77
4    Eugenius             3    60.0    4    4.05     6.0   73    77           77    +4
5    Treetops             3    60.0    5    6.55     6.0   -     77           77    +77
6    Barry's Boy          3    60.0    6    7.30     6.0   -     77           77    +77
7    The Muffin Man       3    60.0    7    9.30     6.0   -     77           77    +77
8    Onssilverjet         3    53.5    8    10.30    6.0   -     64           64    +64
9    Makajima             3    60.0    9    13.05    6.0   -     77           77    +77
10   George Rex           3    60.0    10   13.80    6.0   -     77           77    +77
99   Fast Train           3    60.0    99   0.00     6.0   -     77           77    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Loving Prague (AUS) - 83 6 +77 6.0 -
2 Red Wave Line 81 76 81 -5 4.0
3 I Am Sam - 70 77 -7 6.0 -
4 Eugenius 73 74 77 -3 6.0 -
5 Treetops - - 77 -77 6.0 -
6 Barry's Boy - 70 77 -7 6.0 -
7 The Muffin Man - 65 77 -12 6.0 -
8 Onssilverjet - 57 64 -7 6.0 -
9 Makajima - 68 77 -9 6.0 -
10 George Rex - 65 77 -12 6.0 -
99 Fast Train - 82 77 +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