Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Tana Maree
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
6 / 9
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    Tana Maree           4    60.0    1    0.00     4.0   73    73           73    +0
2    Genovefa             3    60.0    2    3.00     3.5   -     74           74    +74
3    Empress Wu           3    60.0    3    4.50     3.5   67    74           74    +7
4    Like A Prayer        3    60.0    4    7.80     3.5   70    74           74    +4
5    Shadow Of The Moon   3    60.0    5    10.50    3.5   -     74           74    +74
6    Line In The Sky      4    60.0    6    11.20    4.0   71    73           73    +2
7    Harper's Way         3    60.0    7    11.50    3.5   -     74           74    +74
8    Cape Flower          3    60.0    8    13.25    3.5   65    74           74    +9
9    Potato Salad         4    60.0    9    14.00    4.0   62    73           73    +11
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tana Maree Line 73 72 73 -1 4.0
2 Genovefa - 72 74 -2 3.5 -
3 Empress Wu 67 61 74 -13 3.5 -
4 Like A Prayer 70 63 74 -11 3.5 -
5 Shadow Of The Moon - 57 74 -17 3.5 -
6 Line In The Sky 71 72 73 -1 4.0 -
7 Harper's Way - 56 74 -18 3.5 -
8 Cape Flower 65 57 74 -17 3.5 -
9 Potato Salad 62 47 73 -26 4.0 -
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