Official NHA Assessment

Race 6: THE SBS SPRINT MERIT RATED 98 HANDICAP (Open)

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Line Horse
Only Him
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
0 / 5
Within 2 points
Significant Diffs
4 / 5
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    Jet Mirage           3    54.0    1    0.00     1.5   86    87           86    +0
2    Only Him             4    60.0    2    3.00     2.0   98    98           98    +0
3    Brianna              4    59.0    3    4.00     2.0   96    96           96    +0
4    Varnica              5    56.5    4    4.75     0.0   91    95           95    +4
5    Emerald Floe         4    56.5    5    5.75     2.0   91    91           91    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Jet Mirage 86 100 86 +14 1.5 -
2 Only Him Line 98 87 98 -11 2.0
3 Brianna 96 103 96 +7 2.0 -
4 Varnica 91 90 95 -5 0.0 -
5 Emerald Floe 91 82 91 -9 2.0 -
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