Official NHA Assessment

Race 6: WSB GRAND HERITAGE 21 DECEMBER MR 96 HANDICAP (Open)

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Line Horse
Strewn Sky
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
4 / 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    Command Pilot        2    56.5    1    0.00     0.0   89    87           89    +0
2    Strewn Sky           2    54.5    2    2.50     0.0   85    85           85    +0
3    Quatermain           2    54.0    3    4.80     0.0   84    82           82    -2
4    Whafeef              6    60.0    4    6.10     0.0   96    94           94    -2
5    Professor Snape      2    53.0    5    6.90     0.0   82    80           80    -2
6    Southern Blaze       3    55.0    6    8.15     6.0   89    72           79    -10
7    Rule Book            6    60.0    7    9.75     0.0   96    94           94    -2
99   We Are The Logans    2    57.5    99   0.00     0.0   -     89           89    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Command Pilot 89 93 89 +4 0.0 -
2 Strewn Sky Line 85 69 85 -16 0.0
3 Quatermain 84 79 82 -3 0.0 -
4 Whafeef 96 91 94 -3 0.0 -
5 Professor Snape 82 68 80 -12 0.0 -
6 Southern Blaze 89 89 79 +10 6.0 -
7 Rule Book 96 92 94 -2 0.0 -
99 We Are The Logans - 73 89 -16 0.0 -
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