Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN HANDICAP (For Maidens with 3 or more runs.R15000 Win bonus ROA Members)

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Line Horse
Japanese Maple
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 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    Teo Torriatte        4    59.5    1    0.00     1.0   71    71           70    -1
2    Japanese Maple       4    59.5    2    0.25     1.0   71    71           71    +0
3    Angel Of My Heart    3    57.0    3    3.25     3.5   66    64           64    -2
4    Callaburn            2    60.0    4    3.35     0.0   72    76           76    +4
5    Plum Blossom         3    48.0    5    8.50     3.5   45    43           43    -2
6    Kamala Hill          3    52.0    6    12.00    3.5   42    51           51    +9
99   Pomo Clapper         2    58.0    99   0.00     0.0   -     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 Teo Torriatte 71 94 70 +24 1.0 -
2 Japanese Maple Line 71 56 71 -15 1.0
3 Angel Of My Heart 66 51 64 -13 3.5 -
4 Callaburn 72 52 76 -24 0.0 -
5 Plum Blossom 45 53 43 +10 3.5 -
6 Kamala Hill 42 39 51 -12 3.5 -
99 Pomo Clapper - 68 70 -2 0.0 -
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