Official NHA Assessment

Race 4: TAB TELEBET 0861 000 822 MAIDEN PLATE (For all Maidens)

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Line Horse
Joe Harman
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 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    Casero               3    60.0    1    0.00     3.5   61    54           54    -7
2    Joe Harman           4    60.0    2    0.25     1.5   58    58           58    +0
3    Silvan Park          4    60.0    3    0.35     1.5   53    65           65    +12
4    Irish Sea            3    60.0    4    3.10     3.5   60    57           57    -3
5    Star Rider           4    60.0    5    5.35     1.5   49    58           58    +9
6    Zero Rate            5    58.5    6    11.85    0.0   47    58           58    +11
7    Jumeirah Gold        4    60.0    7    13.10    1.5   49    58           58    +9
99   Jack In The Box      5    58.5    99   0.00     0.0   -     58           58    +0
99   War Man              3    60.0    99   0.00     3.5   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Casero 61 63 54 +9 3.5 -
2 Joe Harman Line 58 54 58 -4 1.5
3 Silvan Park 53 44 65 -21 1.5 -
4 Irish Sea 60 52 57 -5 3.5 -
5 Star Rider 49 51 58 -7 1.5 -
6 Zero Rate 47 42 58 -16 0.0 -
7 Jumeirah Gold 49 40 58 -18 1.5 -
99 Jack In The Box - 53 58 -5 0.0 -
99 War Man - 75 54 +21 3.5 -
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