Official NHA Assessment

Race 8: RACEHORSE OWNERS ASSOCIATION MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Tsar Bomba
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    Zinovi               2    60.0    1    0.00     2.5   102   96           96    -6
2    Aussenkehr           2    62.0    2    2.50     2.5   100   100          100   +0
3    Tsar Bomba           3    60.0    3    4.10     3.5   94    94           94    +0
4    Karangetang          2    62.0    4    4.30     2.5   100   100          100   +0
5    Chrome Tourmaline    4    56.5    5    4.45     4.0   98    86           88    -10
6    Ragnar Lothbrok      3    54.0    6    4.50     3.5   85    82           82    -3
7    Fire 'N Flames       4    54.0    7    5.25     4.0   95    81           85    -10
8    Palace Revolt        2    50.0    8    6.75     2.5   82    76           76    -6
99   Mid Winter Wind      3    58.0    99   0.00     3.5   -     90           90    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zinovi 102 120 96 +24 2.5 -
2 Aussenkehr 100 79 100 -21 2.5 -
3 Tsar Bomba Line 94 91 94 -3 3.5
4 Karangetang 100 95 100 -5 2.5 -
5 Chrome Tourmaline 98 107 88 +19 4.0 -
6 Ragnar Lothbrok 85 81 82 -1 3.5 -
7 Fire 'N Flames 95 103 85 +18 4.0 -
8 Palace Revolt 82 64 76 -12 2.5 -
99 Mid Winter Wind - 116 90 +26 3.5 -
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