Official NHA Assessment

Race 6: RACING240 MR 86 HANDICAP (Open)

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Line Horse
Haarlem
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
4 / 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    Roll Of The Dice     3    54.0    1    0.00     1.5   73    77           73    +0
2    Red William          5    52.5    2    0.10     0.0   71    77           77    +6
3    Haarlem              3    53.5    3    0.20     1.5   76    76           76    +0
4    Mr Fox               3    58.0    4    3.45     1.5   85    88           88    +3
5    Slainte Mhath        4    56.5    5    4.20     0.5   79    86           86    +7
6    Catch The Tune       6    50.5    6    8.20     0.0   75    73           73    -2
7    Harold The Duke      3    60.0    7    17.45    1.5   86    89           89    +3
99   Jack In The Green    2    57.0    99   0.00     0.0   -     86           86    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Roll Of The Dice 73 81 73 +8 1.5 -
2 Red William 71 83 77 +6 0.0 -
3 Haarlem Line 76 73 76 -3 1.5
4 Mr Fox 85 99 88 +11 1.5 -
5 Slainte Mhath 79 81 86 -5 0.5 -
6 Catch The Tune 75 70 73 -3 0.0 -
7 Harold The Duke 86 86 89 -3 1.5 -
99 Jack In The Green - 80 86 -6 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