Official NHA Assessment

Race 9: HEATHER ADAMSON MR 100 HANDICAP (Open)

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Line Horse
Blizzard Snow
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
6 / 9
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    Slinky Mapimpi       5    58.5    1    0.00     0.0   97    123          97    +0
2    Blizzard Snow        3    51.5    2    0.80     10.5  88    88           88    +0
3    Rollwiththepunches   6    55.5    3    1.00     0.0   91    117          117   +26
4    One Fell Swoop       2    59.5    4    4.25     7.0   99    111          111   +12
5    Sunset Riot          2    60.0    5    4.30     7.0   100   112          112   +12
6    Passage Of Power     6    56.5    6    6.10     0.0   93    119          119   +26
7    Red Bomber           2    60.0    7    7.50     7.0   103   112          112   +9
8    Halberdier           4    55.0    8    8.50     12.0  90    92           92    +2
9    Warm Winter Nite     2    56.0    9    99.99    7.0   92    104          104   +12
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Slinky Mapimpi 97 101 97 +4 0.0 -
2 Blizzard Snow Line 88 86 88 -2 10.5
3 Rollwiththepunches 91 90 117 -27 0.0 -
4 One Fell Swoop 99 97 111 -14 7.0 -
5 Sunset Riot 100 107 112 -5 7.0 -
6 Passage Of Power 93 76 119 -43 0.0 -
7 Red Bomber 103 86 112 -26 7.0 -
8 Halberdier 90 83 92 -9 12.0 -
9 Warm Winter Nite 92 92 104 -12 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