Official NHA Assessment

Race 5: MERIT RATED 90 HANDICAP (Open)

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Line Horse
Guerra
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 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    Tom's Diner          4    60.0    1    0.00     0.0   89    89           89    +0
2    Queen Of Fire        3    56.0    2    0.75     2.5   84    76           76    -8
3    Guerra               4    57.5    3    2.00     0.0   84    84           84    +0
4    Power Ranger         7    56.5    4    4.50     0.0   82    82           82    +0
5    Red Top              5    54.0    5    5.25     0.0   77    77           77    +0
6    Ultimate Jewel       5    59.0    6    6.25     0.0   87    87           87    +0
7    Kallipos             3    52.5    7    13.25    2.5   74    69           69    -5
99   Admirals Chance      5    59.0    99   0.00     0.0   88    87           88    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tom's Diner 89 94 89 +5 0.0 -
2 Queen Of Fire 84 71 76 -5 2.5 -
3 Guerra Line 84 86 84 +2 0.0
4 Power Ranger 82 69 82 -13 0.0 -
5 Red Top 77 70 77 -7 0.0 -
6 Ultimate Jewel 87 80 87 -7 0.0 -
7 Kallipos 74 63 69 -6 2.5 -
99 Admirals Chance 88 77 88 -11 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