Official NHA Assessment

Race 6: BETWAY MR 66 HANDICAP (Open)

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Line Horse
Green Sceptre
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
6 / 11
Within 2 points
Significant Diffs
4 / 11
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    Fast Duty            3    59.5    1    0.00     8.5   65    43           65    +0
2    Guerilla Warfare     3    61.5    2    0.75     8.5   86    51           76    -10
3    Green Sceptre        2    52.5    3    1.25     0.0   50    50           50    +0
4    Written In Stone     9    56.5    4    1.50     0.0   59    57           57    -2
5    Bob Lee Swagger      4    55.0    5    2.25     6.0   62    42           52    -10
6    Sail The Sky         4    59.0    6    3.25     6.0   65    49           55    -10
7    Captain Jim          3    59.5    7    4.00     8.5   66    44           56    -10
8    Kittyboys Girl       2    57.0    8    5.75     0.0   60    55           55    -5
9    Miraculous Man       3    52.0    9    6.00     8.5   49    28           39    -10
10   Southern Style       5    57.5    10   7.25     0.0   61    56           56    -5
99   Breath Of Magic      4    57.5    99   0.00     6.0   -     44           44    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Fast Duty 65 67 65 +2 8.5 -
2 Guerilla Warfare 86 75 76 -1 8.5 -
3 Green Sceptre Line 50 50 50 ✓ Match 0.0
4 Written In Stone 59 67 57 +10 0.0 -
5 Bob Lee Swagger 62 53 52 +1 6.0 -
6 Sail The Sky 65 62 55 +7 6.0 -
7 Captain Jim 66 54 56 -2 8.5 -
8 Kittyboys Girl 60 59 55 +4 0.0 -
9 Miraculous Man 49 45 39 +6 8.5 -
10 Southern Style 61 54 56 -2 0.0 -
99 Breath Of Magic - 60 44 +16 6.0 -
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