Official NHA Assessment

Race 7: PERFECTLY PLACED CLASS 4 (Open. Benchmark at 60.0kg = 80)

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Line Horse
Tough Terrain
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 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    Bluff On Bluff       3    60.0    1    0.00     4.5   80    71           71    -9
2    Rattlesnake          3    57.0    2    0.05     4.5   80    65           70    -10
3    Tough Terrain        5    61.0    3    0.55     0.0   82    82           82    +0
4    Escarpment           4    61.5    4    2.05     5.0   83    73           73    -10
5    Priscilla Maisey     2    59.5    5    2.25     3.0   85    73           75    -10
6    Porque Te Vas        5    61.0    6    3.00     0.0   82    82           82    +0
7    Fort Red             4    54.0    7    3.20     5.0   68    58           58    -10
8    Shifting Path        2    58.5    8    6.70     3.0   77    71           71    -6
9    Barney Mcgrew        4    58.0    9    7.45     5.0   76    66           66    -10
10   The Charleston       2    61.5    10   13.95    3.0   83    77           77    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bluff On Bluff 80 80 71 +9 4.5 -
2 Rattlesnake 80 85 70 +15 4.5 -
3 Tough Terrain Line 82 81 82 -1 0.0
4 Escarpment 83 79 73 +6 5.0 -
5 Priscilla Maisey 85 80 75 +5 3.0 -
6 Porque Te Vas 82 78 82 -4 0.0 -
7 Fort Red 68 66 58 +8 5.0 -
8 Shifting Path 77 62 71 -9 3.0 -
9 Barney Mcgrew 76 69 66 +3 5.0 -
10 The Charleston 83 83 77 +6 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