Official NHA Assessment

Race 4: JOIN THE IPI TOMBE 100 CLUB BORROWDALE B STAKES 84 (For All Horses with a nett rating of 84 & below)

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Line Horse
Battle Of Seattle
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
4 / 6
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    Kallipos             3    55.5    1    0.00     2.0   70    66           66    -4
2    Battle Of Seattle    2    60.0    2    0.10     0.0   79    79           79    +0
3    Jacky Sparrow        3    57.5    3    0.20     2.0   80    70           70    -10
4    Forgotten Time       3    56.5    4    0.30     2.0   72    73           73    +1
5    Power Ranger         7    57.0    5    0.80     0.0   75    77           77    +2
6    Nandine              3    56.0    6    3.80     2.0   76    68           68    -8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Kallipos 70 63 66 -3 2.0 -
2 Battle Of Seattle Line 79 59 79 -20 0.0
3 Jacky Sparrow 80 80 70 +10 2.0 -
4 Forgotten Time 72 76 73 +3 2.0 -
5 Power Ranger 75 69 77 -8 0.0 -
6 Nandine 76 60 68 -8 2.0 -
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