Official NHA Assessment

Race 3: TAB 4RACING APP MAIDEN PLATE (For all Maidens)

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Line Horse
Cliffie Clavin
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 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    Prolific Star        3    60.0    1    0.00     7.0   65    58           58    -7
2    Grey Warrior         2    58.0    2    1.25     0.0   73    72           72    -1
3    Cliffie Clavin       3    60.0    3    1.35     7.0   61    61           61    +0
4    Bomber Bay           2    60.0    4    2.85     0.0   63    74           74    +11
5    Red Lhasa            2    55.0    5    6.10     0.0   77    62           67    -10
6    Klein Jan            3    58.0    6    8.35     7.0   -     54           54    +54
7    Norse Warrior        2    58.0    7    9.60     0.0   57    68           68    +11
8    Fire Tiger           3    56.0    8    19.10    7.0   57    50           50    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Prolific Star 65 64 58 +6 7.0 -
2 Grey Warrior 73 70 72 -2 0.0 -
3 Cliffie Clavin Line 61 57 61 -4 7.0
4 Bomber Bay 63 60 74 -14 0.0 -
5 Red Lhasa 77 63 67 -4 0.0 -
6 Klein Jan - 59 54 +5 7.0 -
7 Norse Warrior 57 56 68 -12 0.0 -
8 Fire Tiger 57 54 50 +4 7.0 -
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