Official NHA Assessment

Race 8: #destinationcaperacing CLASS 4 (Open. Benchmark at 60.0kg = 78)

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Line Horse
Bluff On Bluff
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
4 / 12
Within 2 points
Significant Diffs
6 / 12
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    Speed Racer          4    60.5    1    0.00     3.5   83    78           78    -5
2    Bluff On Bluff       3    58.5    2    2.00     3.0   75    75           75    +0
3    The Tinkerman        3    59.5    3    3.25     3.0   77    77           77    +0
4    Trippi's Silk        4    57.5    4    3.45     3.5   77    72           72    -5
5    Go It Alone          4    61.0    5    3.50     3.5   84    79           79    -5
6    Dragonfly            3    58.5    6    4.25     3.0   75    75           75    +0
7    Explosive Speed      2    57.0    7    6.50     2.0   76    74           74    -2
8    Major Apollo         2    55.5    8    6.55     2.0   73    71           71    -2
9    Benjamin             4    59.5    9    9.80     3.5   77    76           76    -1
10   Kaapse Klopse        2    60.5    10   11.05    2.0   83    81           81    -2
11   William West         2    58.5    11   12.30    2.0   79    77           77    -2
99   Mighty Mac           5    59.0    99   0.00     0.0   -     82           82    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Speed Racer 83 88 78 +10 3.5 -
2 Bluff On Bluff Line 75 80 75 +5 3.0
3 The Tinkerman 77 76 77 -1 3.0 -
4 Trippi's Silk 77 73 72 +1 3.5 -
5 Go It Alone 84 69 79 -10 3.5 -
6 Dragonfly 75 71 75 -4 3.0 -
7 Explosive Speed 76 68 74 -6 2.0 -
8 Major Apollo 73 72 71 +1 2.0 -
9 Benjamin 77 75 76 -1 3.5 -
10 Kaapse Klopse 83 60 81 -21 2.0 -
11 William West 79 51 77 -26 2.0 -
99 Mighty Mac - 52 82 -30 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