Official NHA Assessment

Race 5: CHARITY CHASE BORROWDALE A STAKES 98 (For All Horses with a nett rating of 98 & below)

Back to Race
Line Horse
Last One Standing
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
4 / 6
Within 2 points
Significant Diffs
2 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Guerra               4    52.5    1    0.00     3.5   83    86           86    +3
2    Action Zone          3    57.0    2    0.75     7.0   92    92           92    +0
3    Last One Standing    3    57.0    3    1.75     7.0   91    91           91    +0
4    River Power          3    60.0    4    2.50     7.0   97    96           96    -1
5    Jaeger Moon          7    60.0    5    4.50     0.0   97    108          108   +11
99   Magic Exists         3    51.0    99   0.00     7.0   -     76           76    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Guerra 83 86 86 ✓ Match 3.5 -
2 Action Zone 92 90 92 -2 7.0 -
3 Last One Standing Line 91 93 91 +2 7.0
4 River Power 97 97 96 +1 7.0 -
5 Jaeger Moon 97 97 108 -11 0.0 -
99 Magic Exists - 91 76 +15 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