Official NHA Assessment

Race 9: BETWAY MR 96 HANDICAP (Open)

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Line Horse
Rainbow Reward
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    Karangetang          2    56.5    1    0.00     5.5   92    78           92    +0
2    Rainbow Reward       5    55.0    2    1.75     0.0   86    86           86    +0
3    Yamadori             4    56.5    3    4.50     10.0  94    69           84    -10
4    Swing Upon A Star    2    62.5    4    4.70     5.5   101   90           91    -10
5    Paisley Park         4    59.0    5    5.80     10.0  94    74           84    -10
6    Smith And Wesson     2    54.0    6    6.00     5.5   84    73           74    -10
7    Kinshin Sha          4    54.5    7    6.90     10.0  84    65           74    -10
8    Aussenkehr           2    62.0    8    11.40    5.5   100   89           90    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Karangetang 92 95 92 +3 5.5 -
2 Rainbow Reward Line 86 89 86 +3 0.0
3 Yamadori 94 97 84 +13 10.0 -
4 Swing Upon A Star 101 102 91 +11 5.5 -
5 Paisley Park 94 91 84 +7 10.0 -
6 Smith And Wesson 84 73 74 -1 5.5 -
7 Kinshin Sha 84 62 74 -12 10.0 -
8 Aussenkehr 100 79 90 -11 5.5 -
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