Official NHA Assessment

Race 8: WSB R10000 DEPOSIT MATCH FM 76 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Chilly Winter
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
4 / 10
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    Ma Black             4    60.0    1    0.00     0.0   76    76           76    +0
2    Chilly Winter        5    58.5    2    2.25     0.0   73    73           73    +0
3    Different Face (GB)  4    62.0    3    5.50     0.0   80    80           80    +0
4    Seeking Peace        3    57.0    4    6.00     2.5   73    65           65    -8
5    What A State         3    59.5    5    8.25     2.5   78    70           70    -8
6    Arctic Ice           4    54.0    6    10.75    0.0   64    64           64    +0
7    Primula              2    53.0    7    12.25    1.5   81    59           71    -10
8    Super Siri           3    54.5    8    12.30    2.5   68    60           60    -8
99   African Winter       4    52.0    99   0.00     0.0   -     60           60    +0
99   Apollo Moon          3    56.0    99   0.00     2.5   -     63           63    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ma Black 76 74 76 -2 0.0 -
2 Chilly Winter Line 73 73 73 ✓ Match 0.0
3 Different Face (GB) 80 76 80 -4 0.0 -
4 Seeking Peace 73 55 65 -10 2.5 -
5 What A State 78 82 70 +12 2.5 -
6 Arctic Ice 64 70 64 +6 0.0 -
7 Primula 81 57 71 -14 1.5 -
8 Super Siri 68 63 60 +3 2.5 -
99 African Winter - 59 60 -1 0.0 -
99 Apollo Moon - 63 63 ✓ Match 2.5 -
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