Official NHA Assessment

Race 8: NEXT FAIRVIEW RACEMEETING FRIDAY 22 DECEMBER MR 66 HANDICAP (Open)

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Line Horse
Clap Of Thunder
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
6 / 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    American Dream       3    59.0    1    0.00     5.0   64    61           64    +0
2    Bennelong Point      2    59.0    2    1.25     0.0   64    75           75    +11
3    Clap Of Thunder      3    61.0    3    2.25     5.0   68    68           68    +0
4    Watch Tower          2    60.0    4    3.50     0.0   76    74           74    -2
5    Hallerbos            3    59.5    5    4.75     5.0   65    62           62    -3
6    Arturo               2    56.5    6    5.00     0.0   69    66           66    -3
7    Pedro                6    60.5    7    6.00     0.0   67    74           74    +7
8    Duke Of Orange       3    56.5    8    6.50     5.0   59    56           56    -3
9    Phantomoftheforest   3    59.0    9    9.00     5.0   64    61           61    -3
99   Guerra               4    60.5    99   0.00     3.0   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 American Dream 64 81 64 +17 5.0 -
2 Bennelong Point 64 58 75 -17 0.0 -
3 Clap Of Thunder Line 68 66 68 -2 5.0
4 Watch Tower 76 68 74 -6 0.0 -
5 Hallerbos 65 57 62 -5 5.0 -
6 Arturo 69 76 66 +10 0.0 -
7 Pedro 67 72 74 -2 0.0 -
8 Duke Of Orange 59 53 56 -3 5.0 -
9 Phantomoftheforest 64 50 61 -11 5.0 -
99 Guerra - 86 68 +18 3.0 -
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